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How to setup VOIP for a small branch office

Posted on 2010-09-07
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Last Modified: 2012-05-10
I have a small branch office of about 5 people. I have some extra Cisco VOIP phones form our headquarter office in Chesapeake. I would like to incorporate our phone system now at this office. DO I pnly need a gateway?
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Question by:dolphan757
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by:Alex Bahar
ID: 33618532
You just need a router and a switch for connecting the phones.
The phones will register to the call manager at your headquarter.
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by:Alex Bahar
ID: 33618569
Ideally you should have an SRST site in case WAN goes down. However it will cost you licence fees etc.

I assume you have a Cisco Call Manager. You should create a new device pool, region, location etc for your remote site. Your router at remote site should provide the IP addresses to your phones. Make sure you configure DHCP option 150 to point to your TFTP server at the central site.
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Alex Bahar earned 500 total points
ID: 33618629
Forgot to say>
Do not forget to implement QoS between the remote site and central site for voice quality.
Normally you should use G729 codec for saving bandwidth. However considering you have only 5 phones, you may be fine with using G711 codec that will keep it simple. If you decide to use G729 then you may need to implement transcoders etc. That will make your design and troubleshooting complicated. In my opinion it is not worth to worry about WAN bandwidth savings for such a small remote site. Just use G711 to keep it simple.
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