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VOIP and Gateways Query

Posted on 2012-04-03
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Last Modified: 2012-04-09
Hi,

We are looking at using lync as the voip solution for our company. I have a good understanding of what is required, just am a little confused as to the PSTN side of the network.

We have 18 sites all with different (and old) PABX boxes for calls. I know that the lync server can route calls out to gateways if PSTN is required, are these PABX's the gateway devices that need to be configured for routing or do we need a gateway in between the PABX and the LYNC server?

Also, should I be getting my ISP to provide us with a SIP trunk and have them route out calls via their PSTN network if required?

A little confused about how to design this thing. Any help would be greatly appreciated.
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Question by:Network_Padawan
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by:agonza07
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Check out Broadvox.  www.broadvox.com

If you are in the US, you can basically centralize all your POTS to one location. Make sure to have redundancy, but other than that you may be able to get rid of those local lines.
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by:Network_Padawan
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Hi agonza, thanks but I just wanted someone to clear up the infrastructure side of things for me. If I have old pbx boxes on all sites, can I use then as GW's to route traffic from VOIP to PSTN or do I need a GW between the PBX and the Mananger(in this case, the Lync front end server).
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agonza07 earned 300 total points
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Sorry, I guess I was under the belief that you were going to get rid of the remote site's PBX.

Yes, you will need a gateway between the PBX and the Lync server. Unless the PBX already has a VoIP interface, but that is unlikely.

Here's a site to read up on:

http://www.justin-morris.net/why-you-should-deploy-a-media-gateway-in-a-lync-voice-deployment/
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by:Network_Padawan
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thanks.
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