VOIP calls between Router & PBX

Unanswered Question
Sep 8th, 2009


Currently running Siemens PBX for internal Calling & PSTN.

Other remote locations are connected through WAN links which are terminated on Cisco 3845 Router.

We are planning to do the VOIP calls to these remote locations. In the router we added E1 card with the necessary DSP resources. In the Router, Configured QSIG trunk and connected to PBX . But VOIP calls are not happenning.

Can someone help me out!!!


I have this problem too.
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a.gooding Thu, 09/10/2009 - 17:15

ill take a stab,

1. you have added a E1 on the router that is connected directly to the PBX (the E1 is up and functional correct - you have multiframes established?)

2. What are the devices at the remote locations? - do you have another PBX there as well or some analog phones?

3. if the E1 is up and you dial, does it reach any of the E1 ports?

4. if you dont see anything on the ports (do a show voice call stat) then trace back from port to PBX.

5. Have you added route members etc on the PBX to tell it to grab the E1 trunk (Your side of course) and send it across if the user is trying to dial a remote location extension.

hopefully this might give you some pointers and maybe you can be a little more specific than "VOIP calls are not happenning" :)


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