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Saturday, November 30, 2013

Bagaimana menghubungkan Android ke OzekiPhone ?



How to connect your Android Mobile to the Ozeki Phone System XE


Use your smartphone as a mobile SIP extension by using CSIPSimple application. For this purpose, you need to install the CSipSimple application on your Android Mobile Phone and an Ozeki Phone System XE on your Windows PC. This guide describes what else you need and how you should configure your mobile in order to turn your smartphone into a full-featured extension of your VoIP network.

Are you an Apple user? Click here
Video tutorial:How to connect your Android Mobile to the Ozeki Phone System XE


What you should do to create a connection

 
Step 1: Create a SIP account in Ozeki XE

Step 2: Install CSipSimple

Step 3: Configure CSiPSimple

Step 4: Make a test call

Step 1: Create a SIP account in Ozeki XE

After you have installed the Ozeki Phone System XE, you need to start the software. (If you need assistance in connection with the download process, installation and product activation, please visit the following page: Quick Start Guide. Here you can find a detailed step-by-step installation guide about the first steps.)
After launching the software, the login panel will automatically appear on the WebGUI. Now, it is time tologin by giving your username and password (Figure 1).

Figure 1 - Logging after installation
If you have specified the appropriate user data, you need to click on the Install new button in the top right-hand corner of the greenish yellow Extensions panel (Figure 2).

Figure 2 - Ozeki Phone System XE home screen
The "Extensions" panel will appear. Look for the "SIP extension" line in the Standard Extensions column then click on the Install button (Figure 3).

Figure 3 - Install a SIP extension
Now, a Configuration form can be seen, where you can specify the SIP account details to use for this extension: the Extension phone number (optional), the Authentication name (obligatory) and the password (obligatory) (Figure 4). Click on "OK" button.

Figure 4 - The configuration panel of the new SIP extension
Having done these steps, you need to connect your Android Mobile Phone to your telecommunication system.

Step 2: Install CSipSimple

In order to connect your mobile phone to your communication system, you need an application that can be used to turn your phone into a mobile extension. One of the most reliable apps is CSipSimple.
In order to install CSipSimple you need to download it from Google Play:

          Option 1: Visit Google Play website: Download from Google Play

          Option 2: Scan the following QR code:
◄ Scan to download CSipSimple
Figure 5 - Download CSipSimple from Google Play

Step 3: Configure CSipSimple

  1. After you have launched CSipSimple, select the most appropriate connection method then click on "Save" button (Figure 6)

    Figure 6 - Select connection method

  2. Click on "Add account" then select the "Basic" menu item from the Generic wizards (Figure 7)
        
    Figure 7 - Add account

  3. Now, you need to provide the user data that you defined earlier in the Ozeki Phone System XE WebGUI (see Figure 4). First, click on "Account name" and specify the name of your account (Figure 8). After dialing this can be seen, when you have to choose where the call should be initiated: Mobile or VoIP. After it is done, click on "OK" button. Similarly, click on "User" and enter the phone number of the new extension. Your mobile phone will be available on this telephone number. Click on "OK" button. After that, select "Server" and type the IP address of your Ozeki Phone System XE then click on "OK". Finally, choose "Password" menu item and enter the password of the extension. Click on "OK" button. Save your configuration by clicking on "Save" button.
        
    Figure 8 - Specify user data

  4. After providing proper user data, your new account will be like a Registered account. It shows thatyour mobile phone is ready to use. Click on "Accounts" in the top left-hand of the screen and thekeypad will appear (Figure 9).
        
    Figure 9 - Mobile extension is ready to use

Step 4: Make a test call

In order to make a call, enter a phone number (the number of the extension you would call) by using the keypad. Click on the telephone icon to initiate the call. On Figure 10 you can see that our sample extension (1002) called an other SIP extension (1004) and the last picture shows an incoming call as well, from the other extension (1004).
        
Figure 10 - Test call
Conclusion
The guide above presented how to connect your Android Mobile (smartphone and tablet as well) to the Ozeki Phone System XE. If you follow these steps you will be able to install and configure the CSipSimple application and to use your Android Mobile as a full-featured mobile extension of your communication system.
If you have any questions or need assistance, please contact us at  info@ozekiphone.com

Bagaimana menghubungkan iPhone Anda dgn OzekiPhone?



How to connect your iPhone to the
Ozeki Phone System XE


Turn your iPhone Mobile into a full-featured mobile SIP extension with Bria iPhone or iPad Edition. To achieve this, you need to install the Bria application on your iPhone Mobile Phone and an Ozeki Phone System XE on your Windows PC. This step-by-step guide explains you what you should do in order to use your cell phone similarly to a conventional desktop phone extension of your communication network.
Are you a Windows Phone user? Click here
Video tutorial:How to connect your iPhone Mobile to the Ozeki Phone System XE

What you should do to create a connection

 
Step 1: Create a SIP account in Ozeki XE

Step 2: Install Bria

Step 3: Configure Bria

Step 4: Make a test call

Step 1: Create a SIP account in Ozeki XE

Firstly, you need to install the Ozeki Phone System XE. After you have downloaded the software, reading the Quick Start Guide is recommended in order to get some useful instructions about how to setup the Ozeki Phone System XE on your Windows PC. When your PBX is installed, start the software by clicking on its desktop icon.
After launching the software, the login window can be seen on the WebGUI. First of all, you need to login by providing your username and password (Figure 1).

Figure 1 - Logging after installation
If you have given your login information and clicked the “Login” button, the home screen will appear. On the right side of the screen, in the top right-hand corner of the “Extensions panel”, you need to click on “Install new” button (Figure 2).

Figure 2 - The Ozeki Phone System XE home screen
Thereafter, the "Extensions" panel appears. Within the “Standard Extensions” look for the "SIP extension" line and click on the “Install” button (Figure 3).

Figure 3 - Install a SIP extension
In the next screen the Configuration panel can be seen. Here you need to specify the SIP account detailsto use for this extension: the Extension phone number (optional, i.e. you can accept the offered number or enter another one), the Authentication name (obligatory) and the Password (obligatory) (Figure 4).

Figure 4 - The configuration panel of the new SIP extension

Step 2: Install Bria

Now, it is time to connect your iPhone Mobile to your telecommunication system. For this purpose, you need an application that can be used to turn your phone into a mobile extension. According to personal experience, Bria softphone is great for iPhone users.
In order to install Bria you need to download it from iPhone Store:

          Option 1: Visit iPhone Store website: Download from iPhone Store

          Option 2: Scan the following QR code:
◄ Scan to download Bria
Figure 5 - Download Bria from iPhone Store

Step 3: Configure Bria

  1. After you have launched Bria, select the "Accounts" menu item then click on "+" button in the top right-hand corner of the screen to add a new account (Figure 6)
        
    Figure 6 - Add account

  2. On the "Select VoIP Provider" screen select "SIP - Making Calls" from the User-defined Accounts (Figure 7)
       
    Figure 7 - Select SIP account

  3. Now, you need to specify the user details that you defined earlier in the Ozeki Phone System XE WebGUI (see Figure 4). Firstly, click on "Display as" and specify a unique user name that will be shown on your contact list. It is an optional setting. If you do not enter a unique name, the number of the mobile extension will be shown by default (Figure 8). Similarly, click on "Username" and enter the phone number of the new extension. Your mobile phone will be available on this telephone number. After that, click on "Password" menu item and enter the password of the extension. Finally, click on "Domain" and provide the IP address of your Ozeki Phone System XE. Turn your account status into "Registered" by dragging the circular button to the right in the buttom right-hand corner of the screen in the "Enable" line. This action will automatically register your account. In the top of the screen the "Registered" caption shows that your account is enabled. Save your configuration by clicking on "Save" button in the top right-hand of the screen (Figure 7).
        
    Figure 8 - Specify user details

  4. After providing user details, your new account appears within "Enabled" accounts. It means thatyour mobile phone is ready to use. Click on the telephone icon in the bottom left-hand of the screen and the keypad will appear (Figure 9).
        
    Figure 9 - Mobile extension is ready to use

Step 4: Make a test call

In order to make a call, enter a phone number (the number of the extension you would call) by using the keypad. Click on "Call" button to initiate the call. On Figure 10 you can see that our sample extension (1004) called an other SIP extension (1002) and the last picture shows an incoming call as well, from the other extension (1002).
        
Figure 10 - Test call
Conclusion
This guide provided detailed information about how to connect your iPhone Mobile to the Ozeki Phone System XE. By following these instructions you will be able to install and configure the Bria application and to use your iPhone Mobile as a full-featured mobile extension of your VoIP system.
If you have any questions or need assistance, please contact us at  info@ozekiphone.com

Bagaimana menghubungkan Desktop VoipPhone Anda ke OZEKIPhone?



How to connect a Desktop VoIP Phone to the Ozeki Phone System XE


Due to its great flexibility, the Ozeki Phone System XE enables to connect desktop and mobile phones as well to your PBX. This guide focuses on VoIP desktop phones and describes what you need and how you should configure your desktop IP phone in order to integrate it into your telecommunication network. To achieve this objective, you need a desktop IP phone (such as Grandstream GXP2000 in our example) and an Ozeki Phone System XE installed on your Windows PC.
Do you need a Mobile Extension? Click here
Video tutorial:How to connect a Desktop VoIP Phone to the Ozeki Phone System XE


What you should do to create a connection

 
Step 1: Create a SIP account in Ozeki XE

Step 2: Configure your Desktop Phone

Step 3: Make a test call

Step 1: Create a SIP account in Ozeki XE

First and foremost, you need to install the Ozeki Phone System XE. (If you need assistance in connection with the download process, installation and product activation, please visit the following page: Quick Start Guide. Here you can find a detailed step-by-step installation guide about the first steps.) After installation you need to launch the software.
After starting the software, the login screen will appear automatically on the WebGUI. In order to login you need to enter your username and password then click on the 'Login' button (Figure 1).

Figure 1 - Logging after installation
When you have provided your login details, you need to click on 'Install new' button in the top right-hand corner of the greenish yellow 'Extensions panel' (Figure 2).

Figure 2 - Ozeki Phone System XE home screen
Now, the "Extensions" panel can be seen. Look for the "SIP extension" line in the Standard Extensions column then click on the 'Install' button (Figure 3).

Figure 3 - Install a SIP extension
Clicking on that button, a Configuration will appear, where you can specify the SIP account details to use for this extension: Extension phone number (optional), Authentication name (obligatory) and password (obligatory) (Figure 4). After providing this data, click on "OK" button.

Figure 4 - The configuration panel of the new SIP extension
Having done these steps, you need to connect your Desktop VoIP Phone to your communication system. (In this guide we demonstrate the required configuration steps using a Grandstream GXP2000 device, but the steps are the same for another device as well.)

Step 2: Configure your Desktop VoIP Phone

After you have connected your phone to the VoIP network with the proper cables, the system will assign an individual IP address to the phone by using DHCP. If you use a Grandstream GXP2000 desktop VoIP phone, the IP address can be easily read at the display of the device (Figure 5). If you use another type of desktop phone, you may find it in the menu system of the telephone.

Figure 5 - IP address on a Grandstream GXP2000 desktop VoIP phone
For configuring your desktop phone, you need to open the configuration page of the phone by typing its IP address into your web browser. (In case of Grandstream GXP2000, you need to click on 'Account 1' for configuring the extension onto the Line 1.) On the configuration panel you need to specify the following information (Figure 6):
  • Account Active: Yes
  • Account Name: e.g. YourCompany
  • SIP Server: the IP address of your Ozeki Phone System XE
  • SIP User ID: the user part of an SIP address
  • Authenticate ID: can be same or different from SIP User ID
  • Authenticate Password: optional
  • Name: optional, e.g. John Sample

Figure 6 - Configuring a Desktop Phone (Grandstream GXP2000)
If you use another kind of desktop phone, you also need to specify a Display name, Username (Extension phone number), Password, Authentication name and the IP address of the Ozeki Phone System XE.
After specifying the SIP details, click on the 'Update' button at the bottom of the page. The phone will be booted. When it is ready, click on the 'Reboot' button.
Now return to the Ozeki Phone System XE and click on the Log button. The 'Registration accepted' message will appear, if your configuration was successful (Figure 6).

Step 3: Make a test call

In order to make a call, dial the phone number of your new extension by using an other extension of your VoIP network. (In our example the No. 1200 extension dialled the new No. 1100 Desktop VoIP Phone extension.) Figure 7 shows that the whole call process can be tracked in the Log panel of your extension. 'Incoming call received' message indicates that an incoming call is in progress. 'Call established' message shows that the incoming call has been answered. After finishing the call, the 'Call completed' message will appear.

Figure 7 - Test call log
Conclusion
The guide above presented that Desktop VoIP Phones can be easily connected to the Ozeki Phone System XE. If you follow that step-by-step, you will be able to install a new SIP extension in the PBX and configure your phone on its web GUI quickly. That's it. After that, your phone will be ready to use.
If you have any questions or need assistance, please contact us at  info@ozekiphone.com

Bagaimana menghubungkan OzekiPhone ke jaringan telepon Anda?



Connect the Ozeki Phone System XE to a telephone network


Connect to the landline network

The Ozeki Phone System XE allows you to connect your VoIP telephone system to the Public Switched Telephone Network (PSTN) in various ways. Check out your options.

Control inbound and outbound calls

After you have installed your connections to the telephone network you will want to control inbound and outbound calls. Read the following articles.

Connect to the mobile network

When you wish to connect to the mobile network you can choose to connect to the SMS service or to the telephone service. The SMS service can be used for sending and receiving SMS text messages. To connect to the SMS service Ozeki XE offers three methods:
To connect to the mobile telephone network, to make voice calls, you need to use a VoIP GSM gateway. Check out the following document to see one in action:

10 Tip VOIP PBX



Top 10 VoIP PBX tricks


Trick #1 - It is a good practice to use VoIP phones provided by the same manufacturer. VoIP phones provided by the same manufacturer use the same voice encoding techniques (codecs). This enables them to talk directly with each other, and in this case the PBX can take part in call setup only. If two phones do not have the same encoding procedures (codecs) the voice will go through the PBX and the PBX will be responsible for talking with each device and forwarding the voice traffic between them. This is called codec translation and it wastes a lot of PBX resources.

Trick #2 - For cordless phones a DECT handset connected to a VoIP enabled DECT base station is a better option then a Wifi VoIP handset that connects to the PBX through the LAN. DECT is designed for voice communication, wifi is not designed for it. DECT will give better coverage and better sound quality.

Trick #3 - For local calls it is better to connect to a standard analog or ISDN line provided by the local phone company with an ATA device, then to make calls through a VoIP service provider. It does not make sense to forward all voice traffic to a remote VoIP service through the Internet, to have the VoIP service make the call through the PSTN to the local number.

Trick #4 - For connecting two remote offices it is often better to connect both offices to the same VoIP service provider, then to setup direct call forwarding, or tunneling between them. VoIP providers in most cases will provide
free of charge connectivity between the offices, and they operate a reliable, easy to access infrastracture. Direct tunneling might run into problems caused by dynamic IP addresses and firewall protected office networks.

Trick #5 - If there are many outbound calls to make, for example in a marketing campaign, it is best to setup a dialler software, that will make the calls and decide if they are answered by humans. If the dialer software finds that the call was accepted by a human, it then brings in an employee to talk with him or her. Such a dialler software can save a lot of time, since most calls in a campaign are picked up by answering machines, fax machines or often there is nobody to answer the call. Dialer softwares that can be used are called autodialers or predictive dialers.

Trick #6 - When choosing a VoIP service provider make sure to select one, that provides local telephone numbers with the same area code you are in. This indicates that they have a service point close to you, which increases the probability of better service and sound quality for your area.
Trick #7 - By putting a simple "request callback" form on a website the number of people calling in can be increased greatly. Many people don't like to pick up their handset to dial a phone. It is easier for them to enter their phone number on a website, when they are browsing the web. This way the cost of telephone call will also not prevent them from getting in touch with a business.
Trick #8 - Most office users are not familiar with phone system related terms. By educating them what is call waiting, how to use a conference call, what is follow me, do not disturb, call queue and other simple VoIP services, it is possible to improve overall productivity.

Trick #9 - Software PBX systems can be backed up and restored very easily using traditional software backup techniques. You can save the configuration files, logs, recordings and any user related data. This is very useful, if new hardware needs to be put in place for greater performance, or if the system must be recovered after hardware failure or natural disaster.

Trick #10 - Software PBX systems can be installed on virtual machines. VmWare, Linux kvm, Microsoft Virtual PC or any other virtualisation solution is suitable for running the PBX in a virtualised environment. Virtualisation is very beneficial in long term maintenance and management. It is also one of the tools used by virtual PBX service providers to maintain their infrastructure.

More information:

Introduction to PBX technology in 2013.
Download Ozeki Phone System XE
Read about VoIP PBX technology
Read about mobile PBX technology
Read about webphone PBX technology

Layanan WebPhone memudahkan anda dikontak dari web.



Ozeki Phone System XE -Webphone PBX

Live chat, Voice calls, Video calls

The Ozeki Phone System XE has a built in webphone service. It allows you to add a live chat window to your website. This chat window allows the website visitor to initiate chat, voice and video calls to your office. The website visitor does not have to install any software. As soon as he opens the webpage, he can make a call free of charge to the operator, by simply clicking a button. The website visitor can use his microphone and speaker attached to his PC to make the call. Calls coming from the website can be routed to any VoIP endpoint. They can be sent to an IVR, to a desktop voip phone or to a mobile VoIP handset. This is a truly revolutionary technology. Try it yourself, bydownloading and installing Ozeki Phone System XE.


Cara Kerja AC Split dan bagian-bagiannya

Minggu ini kembali kami mengerjakan ruang server, khususnya terkait raised floor dan AC Split yang dipasang. Jadi ingin sharing terkait dengan AC.


Cara Kerja AC dan Bagian-Bagiannya

Di era serba maju sekarang ini, kita pasti sudah sangat akrab dengan air conditioner. Kehidupan modern, apalagi di perkotaan hampir tidak bisa lepas dari pemanfaatan teknologi ini. Namun apakah banyak dari kita yang tahu bagaimana cara kerja ac sehingga bisa menghasilkan udara yang nyaman (baca: dingin) bagi kehidupan kita?

Udara dingin tersebut sebenarnya merupakan output dari sistem yang terdiri dari beberapa komponen, yaitu; compressor AC, kondensor, orifice tube, evaporator, katup ekspansi, dan evaporator. Berikut adalah penjelasan singkat mengenai peran masing-masing bagian tersebut:

Compressor AC

Compressor AC adalah power unit dari sistem AC. Ketika AC dijalankan, compressor AC mengubah fluida kerja/refrigent berupa gas dari yang bertekanan rendah menjadi gas yang bertekanan tinggi. Gas bertekanan tinggi kemudian diteruskan menuju kondensor.

Kondensor AC

Kondensor adalah sebuah alat yang digunakan untuk mengubah gas yang bertekanan tinggi berubah menjadi cairan yang bertekanan tinggi yang kemudian akan dialirkan ke orifice tube. Kondensor merupakan bagian yang “panas” dari air conditioner. Kondensor bisa disebut heat exchange yang bisa memindahkan panas ke udara atau ke intermediate fluid (semacam air larutan yang mengandung ethylene glycol), untuk membawa panas ke orifice tube.

Orifice Tube

Orifice tube merupakan tempat di mana cairan bertekanan tinggi diturunkan tekanan dan suhunya menjadi cairan dingin bertekanan rendah. Dalam beberapa sistem, selain memasang sebuah orifice tube, dipasang juga katup ekspansi.

Katup Ekspansi

Katup ekspansi merupakan komponen penting dalam sistem air conditioner. Katup ini dirancang untuk mengontrol aliran cairan pendingin melalui katup orifice yang merubah wujud cairan menjadi uap ketika zat pendingin meninggalkan katup pemuaian dan memasuki evaporator/pendingin.

Evaporator AC

Refrigent menyerap panas dalam ruangan melalui kumparan pendingin dan kipas evaporator meniupkan udara dingin ke dalam ruangan. Refrigent dalam evaporator mulai berubah kembali menjadi uap bertekanan rendah, tapi masih mengandung sedikit cairan. Campuran refrigent kemudian masuk ke akumulator / pengering. Ini juga dapat berlaku seperti mulut/orifice kedua bagi cairan yang berubah menjadi uap bertekanan rendah yang murni, sebelum melalui compressor AC untuk memperoleh tekanan dan beredar dalam sistem lagi. Biasanya, evaporator dipasangi silikon yang berfungsi untuk menyerap kelembapan dari refrigent.

Thermostat

Thermostat pada air conditioner beroperasi dengan menggunakan lempeng bimetal yang peka terhadap perubahan suhu ruangan. Lempeng ini terbuat dari 2 metal yang memiliki koefisien pemuaian yang berbeda. Ketika temperatur naik, metal terluar memuai lebih dahulu, sehingga lempeng membengkok dan akhirnya menyentuh sirkuit listrik yang menyebabkan motor AC aktif.
Jadi, cara kerja AC dapat dijelaskan sebagai berkut :

Compressor AC yang ada pada sistem pendingin dipergunakan sebagai alat untuk memampatkan fluida kerja (refrigent), jadi refrigent yang masuk ke dalam compressor AC dialirkan ke condenser yang kemudian dimampatkan di kondenser.

Di bagian kondenser ini refrigent yang dimampatkan akan berubah fase dari refrigent fase uap menjadi refrigent fase cair, maka refrigent mengeluarkan kalor yaitu kalor penguapan yang terkandung di dalam refrigent. Adapun besarnya kalor yang dilepaskan oleh kondenser adalah jumlahan dari energi compressor yang diperlukan dan energi kalor yang diambil evaparator dari substansi yang akan didinginkan.

Pada kondensor tekanan refrigent yang berada dalam pipa-pipa kondenser relatif jauh lebih tinggi dibandingkan dengan tekanan refrigent yang berada pada pipi-pipa evaporator.

Setelah refrigent lewat kondenser dan melepaskan kalor penguapan dari fase uap ke fase cair maka refrigent dilewatkan melalui katup ekspansi, pada katup ekspansi ini refrigent tekanannya diturunkan sehingga refrigent berubah kondisi dari fase cair ke fase uap yang kemudian dialirkan ke evaporator, di dalam evaporator ini refrigent akan berubah keadaannya dari fase cair ke fase uap, perubahan fase ini disebabkan karena tekanan refrigent dibuat sedemikian rupa sehingga refrigent setelah melewati katup ekspansi dan melalui evaporator tekanannya menjadi sangat turun.

Hal ini secara praktis dapat dilakukan dengan jalan diameter pipa yang ada dievaporator relatif lebih besar jika dibandingkan dengan diameter pipa yang ada pada kondenser.
Dengan adanya perubahan kondisi refrigent dari fase cair ke fase uap maka untuk merubahnya dari fase cair ke refrigent fase uap maka proses ini membutuhkan energi yaitu energi penguapan, dalam hal ini energi yang dipergunakan adalah energi yang berada di dalam substansi yang akan didinginkan.

Dengan diambilnya energi yang diambil dalam substansi yang akan didinginkan maka enthalpi [*] substansi yang akan didinginkan akan menjadi turun, dengan turunnya enthalpi maka temperatur dari substansi yang akan didinginkan akan menjadi turun. Proses ini akan berubah terus-menerus sampai terjadi pendinginan yang sesuai dengan keinginan. Dengan adanya mesin pendingin listrik ini maka untuk mendinginkan atau menurunkan temperatur suatu substansi dapat dengan mudah dilakukan.
Perlu diketahui :
Kunci utama dari air conditioner adalah refrigerant, yang umumnya adalah fluorocarbon [**], yang mengalir dalam sistem, menjadi cairan dan melepaskan panas saat dipompa (diberi tekanan), dan menjadi gas dan menyerap panas ketika tekanan dikurangi. Mekanisme berubahnya refrigerant menjadi cairan lalu gas dengan memberi atau mengurangi tekanan terbagi mejadi dua area: sebuah penyaring udara, kipas, dan cooling coil (kumparan pendingin) yang ada pada sisi ruangan dan sebuah compressor (pompa), condenser coil (kumparan penukar panas), dan kipas pada jendela luar.

Udara panas dari ruangan melewati filter, menuju ke cooling coil yang berisi cairan refrigerant yang dingin, sehingga udara menjadi dingin, lalu melalui teralis/kisi-kisi kembali ke dalam ruangan. Pada compressor AC, gas refrigerant dari cooling coil lalu dipanaskan dengan cara pengompresan. Pada condenser coil, refrigerant melepaskan panas dan menjadi cairan, yang tersirkulasi kembali ke cooling coil. Sebuah thermostat AC [***] mengontrol motor compressor AC untuk mengatur suhu ruangan.

[*] Entalphi adalah istilah dalam termodinamika yang menyatakan jumlah energi internal dari suatu sistem termodinamika ditambah energi yang digunakan untuk melakukan kerja.

[**] Fluorocarbon adalah senyawa organik yang mengandung 1 atau lebih atom Fluorine. Lebih dari 100 fluorocarbon yang telah ditemukan. Kelompok Freon dari fluorocarbon terdiri dari Freon-11 (CCl3F) yang digunakan sebagai bahan aerosol, dan Freon-12 (CCl2F2), umumnya digunakan sebagai bahan refrigerant. Saat ini, freon AC dianggap sebagai salah satu penyebab lapisan Ozon Bumi menajdi lubang dan menyebabkan sinar UV masuk. Walaupun, hal tersebut belum terbukti sepenuhnya, produksi fluorocarbon mulai dikurangi.

[***] Thermostat pada air conditioner beroperasi dengan menggunakan lempeng bimetal yang peka terhadap perubahan suhu ruangan. Lempeng ini terbuat dari 2 metal yang memiliki koefisien pemuaian yang berbeda. Ketika temperatur naik, metal terluar memuai lebih dahulu, sehingga lempeng membengkok dan akhirnya menyentuh sirkuit listrik yang menyebabkan motor AC aktif/jalan.

SMS dan Phone System dalam satu solusi = OZEKIPhone



How to setup SMS messaging with the
Ozeki Phone System XE


The Ozeki Phone System XE outstandingly makes it possible to send and receive SMS messages besides VoIP calls and services. The two most common ways to send out a large amount of SMS messages are using a GSM modem or using an SMPP server even through your Android Mobile. You can learn more about these options in the following articles in more detail.
The Ozeki Phone System XE has built in support for two way SMS text messaging. For sending and receiving SMS messages using the Ozeki Phone System XE you can setup an SMPP (Short Message Peer-to-Peer) IP SMS connection or a GSM modem connection or you can install the Ozeki Android SMPP SMS Gateway mobile application for making your smartphone an SMPP server. The following guides are intended to be really useful setup instructions in order to help you send SMS messages in the most effective way.

How to setup SMS messaging using a GSM modem

You can send and receive SMS messages to mobile phones through a wireless connection by attaching a GSM phone or GSM modem to your PBX computer with a data cable. A GSM modem works like a mobile phone with a SIM card. It can be used to send a lot of SMS messages without an Internet connection.
Learn more...

How to setup an SMPP IP SMS connection

For higher performance you may also connect your PBX directly to the Short Message Service Center (SMSC) of a mobile network operator through the Internet. It is called an SMPP IP SMS connection that can be used to transmit huge amounts of SMS messages.                     Learn more...

How to use your Android mobile as an SMPP server

It is a great option to connect your IP system to the GSM network effectively by using your mobile. Turn your smartphone into an SMPP server using Android SMPP SMS Gateway mobile application.                    Learn more...

Read more on how to setup SMS messaging:

OZEKIPhone akan menghilangkan phone system



Killer Phone System

"...an enlightening article for anyone interested in using VoIP in their Office in 2013." 

PBXs
Phone systems in 2013 are much different from phone systems we used a few years ago. Back then phone systems were about VoIP technology, cheap calls and about using the Internet to connect offices free of charge.
Phone systems in 2013 have changed. Now they are about advanced telecommunication capabilities. They offer very exciting advanced features. My favourites are the possiblity of connecting mobile phones to the office with smartphone apps, SMS messaging and website integration. Website integration is a fantastic feature, because it makes it possible for live chat sessions and phone calls to come in directly from webpages into the PBX. Another trend in 2013 is that phone systems are connected to IT systems, such as CRM, helpdesk administration and marketing systems. Let's take a look at how you can build your own advanced phone system.

What is needed to setup an office telephone system? 
In short you need a Windows or Linux PC, a PBX software, some VoIP telephone sets, and a device that will allow you to connect to the Public Switched Telephone Network (PSTN). If you want to go for the advanced features, you will also need a website and optionally a connection to the mobile network.

Starting with a PBX 
As most people remember, a PBX is a "box on the wall" with cables going to the telephone sets. To build an office phone system, the first step is always to setup the PBX. The PBX is the central node of an office telephone system and is responsible for providing "line" to the telephone sets.

In 2013 a PBX is a standard PC with Windows or Linux and with a PBX software installed on it. It is connected to the Ethernet LAN of your office. The PBX software installed on this (server) PC is an application, that controls telephone sets on the network. This software is capable of ringing desktop phones, mobile phones, it can send and receive SMS messages and can manage communication components of webpages. The most popular PBX software for Linux is Asterisk, for Windows it is Ozeki Phone System XE.

There are vendors who create "PBX appliances", "PBX in a box" or "hardware PBX" solutions. These solutions sell the pc and the installed software as a single package. Personally, I do not recommend them, simply because they don't give the power and flexibility of a software PBX installed on a powerful PC.

What kind of telephone sets should I use?

After you have chosen a PBX, you need to decide about telephone sets for your office. You can use your existing analog telephone sets with so called Analog Telephone Adapters (ATA), you can use basic VoIP telephones that offer similar functionality to analog phones and you can use advanced VoIP telephones with large display and advanced features such as video, messaging and telephone applications.

Regardless of your choice, there are some important considerations to take into mind. Whether its a VoIP ATA or a VoIP telephone set, make sure it offers Power Over Ethernet (POE) capability, it is SIP 2.0 complient and make sure the device has two ethernet ports and can bridge ethernet traffic between the ports.

POE is needed to eliminate separate power adapters for each phone to save energy and to reduce points of failure. In 2013 there is no question, that SIP 2.0 is the dominant open standard for VoIP phones. Other VoIP standards, such as H323, Cisco SCCP, etc are out of date. Two ethernet ports are neccessary because most office desks have only one ethernet cable in place. Two ethernet ports make it possible to share the Ethernet endpoint between the VoIP phone and the PC. There are many good manufacturers, who provide reliable VoIP telephone sets that meet these requirements. To name a few: Grandstream, Linksys (now Cisco), Yealink, SNOM, AAstra.

How about cordless telephones?

If you need cordless telephones, the two options are Wifi or DECT handsets. Wifi is used by laptops and mobile devices to connect to the LAN. DECT is the traditional cordless phone standard. If you want to go wireless WIFI surprisingly is NOT a good choice for your telephone sets. Most Wifi networks do not offer roaming, the Wifi radio channel is often very crowded, the package latency is greater and the area of coverage is often smaller. Simply put Wifi was not designed for real time voice, meanwhile DECT was designed for exactly this. For connecting cordless telephones to an office telephone system the best choice is to connect a VoIP enabled DECT base station to your LAN and let the cordless handset communicate through DECT, while the base station can communicate through VoIP with the office PBX. A good cordless device that meets this requirement is the Siemens Gigaset.

Connecting to the Public Telephone Network

Once you have a PBX in place and the office telephone sets are connected to it and can call each other, the next step is to setup a connection to the pubic telephone network. Connections to the public telephone network are often called as Outside lines. To setup a connection to the public telephone network the best option is to take an analog phone line or an ISDN (BRI,E1,T1,J1) line provided by a local telephone company, and to connect it to a PBX through a telephone adapter device. Analog and ISDN lines provide great sound quality and reliability. Patton, Grandstream, Portech, Linksys (now Cisco) provide excellent analog and ISDN telephone adapters. When you buy an analog adapter, you need one with an FXO port. When you buy an ISDN adapter you need one that works in TE mode.

Setting up these telephone adapter devices are usually simple. You need to plug in the phone line provided by the local telecom company and the ethernet LAN and perform some simple configuration steps in the PBX software.

Some experts suggest that one should not use analog or ISDN lines to connect to the public telephone network. They say VoIP services should be used instead. I don't agree with them. The fact is that VoIP services are connected over the Internet where the latency, and the available bandwidth is not constant. This means sound quality and overall reliability is not as good for VoIP services as for traditional telephone services.

Connecting to VoIP service providers

Although analog and ISDN telephone lines connected to a PBX are better for local PSTN connections, in many cases VoIP services should also be used along with the traditional connections. VoIP services are better for long distance and international calls because of pricing. VoIP services are also better if many calls take place at the same time. VoIP providers can setup accounts that allow several hundred or several thousand calls simultanously. VoIP service providers can often offer local phone numbers in remote locations, which can give competitive business advantage.

When looking for a VoIP service provider it is important to make sure to select one, that operates data centres close to the office. To minimise latency and bandwidth problems the Internet connection between the office and the VoIP service provider needs to be excellent. To subscribe for a VoIP service one needs to ask for a SIP account or SIP trunk. The service provider will provide connection details, that should be entered into the PBX.

A list of VoIP service providers is available in the VoIP service provider directory on this site.

Connecting multiple offices

If there are multiple offices that should be connected there are two options. An independent PBX can be installed at each office or a central PBX can be used to control the devices of remote offices. The second option can be taken a step further and a central PBX can be put into a server hosting facility, such as a data centre. This option is often refered to as virtual PBX service or cloud PBX service.

Both options, the one PBX per office and the central PBX option have advantages and disadvantages. If an independent PBX software is installed in each office, the system will be significantly more resilient, because if there is no Internet connection, the local phone system can still operate. If the Internet connection is available the PBXs of the independent offices can communicate through the Internet to provide free calling, if there is no Internet connection between the offices, the PBXs of the independent offices can use the traditional telephone network to make the calls. The users of the telephone system in this case won't even notice, that the Internet is not available temporarily to make calls between the offices. Local PBX system have another advantage: local networks tend to be faster then Internet connections, and if a PBX is installed on the local network, call setup times and telephone services become faster.

If a central PBX is used instead of independent PBXs, PBX administration becomes more simple. All devices connect to the same PBX software directly over the Internet all communication goes through this central node. This makes call recording, voice mail and many enterprise services more simple.

Connecting mobile phones

Connecting mobile devices to a PBX is a need in every organisation. It became one of the most important requirement in 2013. There are 2 major ways to connect mobile phones to a PBX. The first one is adding a so called "mobile extensions". Adding a mobile extension is simply a practice of assigning a short local extension number to a long PSTN mobile number. When a call is directed to this short number the PBX simply calls the mobile phone through an outside line and basically redirects the call. Although this might sound simple it still has many use and is a very powerful feature. If a mobile phone can ring together with several office phones, or if calls coming in to an office land line can be picked up by mobile users, the PBX provides great business advantages. Mobile extensions are also great to separate business telephone numbers from private mobile numbers without the need of carrying two mobile handsets.

The second option for attaching mobile phones is for smartphones. Iphone, Android, Windows Mobile phones and Symbian based Nokia and Ericsson models offer the possibility of installing an app on the device that can interact with telephone features and can communicate through the Internet. Interestingly all major smartphone operating systems have built in SIP stacks, that can be used by these apps to make calls not only through the PSTN, but also through Internet. A smartphone app can turn a mobile phone into a fully featured extension of the PBX. It can offer call transfer, redirects and can interact with Voice applications. The best smartphones for business telephone offer tunneling, which means that the VoIP traffic is sent to the PBX through an encrypted tunnel instead of the native IP stack. This is very useful, because many mobile network operators filter out traditional VoIP traffic on mobile Internet connections to limit competition.

Mobile messaging

SMS has been around for a few years now, just as VoIP. What is changing in 2013 is that SMS is put into business use at an increasing pace. More and more companies equip their PBX systems with SMS capabilities to reach customers, suppliers and employees. The simple reason for this is that SMS messages can be sent automatically, they can be received and processed automatically, the information in them is accurate and SMS is a fantastic tool for automating business procedures. All mobile phones support SMS messaging.

To setup SMS messaging capabilities in an office phone system an SMS gateway software needs to be used. An SMS gateway software can send out SMS messages to mobile phones through the wireless network by using a GSM modem attached to a PC with a phone to pc data cable. More advanced SMS gateway software can connect to SMS service providers through the SMPP protocol over the Internet. An example for such an SMS gateway software would be the Ozeki NG SMS Gateway.

If an SMS gateway is installed into a phone system, office users can use applications installed on their PC to send SMS messages from e-mail or directly from Microsoft Excel. Automated IT solutions often use a database. The SMS gateway software can be configured to query a database table every minute and if it finds new records there it can send them out as SMS messages to mobile phones. This setup is called SQL SMS gateway configuration. Some business applications pass SMS messages to the SMS gateway software using HTTP requests. This setup is called HTTP SMS gateway setup.

Webphone technology

Webphone technology is the trend in 2013. Every other company on the web is adding live chat service to their websites. Many companies also add click to call services and callback request forms. Webphones now also make it possible to make voice and video calls directly from a webbrowser.

To take advantage of webphone technology you need a website and a PBX connected to it. The best choice is to install an independent PBX for accepting calls coming from the web, and connect to this PBX as if it was a VoIP service provider. Webphone capable PBX systems can forward calls from the web to PC workstations or to standard office desktop phones or mobile phones. For live chat sessions a PC based chat console is the best option. For click to call, callback, and embedded webphone calls any office phone or mobile is a good tool to accept the call.

To sum it up building a modern phone system for an office is an exciting challenge, it is a lot of fun, and the advantages an organisation can gain by setting up and maintaining their own system is limitless.
The best way you can start is by downloading and installing
Ozeki Phone System XE. 

Mr. Steve Greenwood
Technical Advisor 
Ozeki Informatics Ltd.