I have currently been assigned with starting the implementaion of moving in the direction of VoIP over my wan. My current phone system at the core of my network is a siemens. It has IP capabilities, but I am very unfamiliar with it. Bascially we want the whole four digit dialing deal over the wan. I have installed 2800 series routers in all of my remote sites in prep for this. Is it going to be easier for me to just install voice modules in these routers to do this? or to use my existing pbx to do trunking? I am very confused on where to even begin my research.
If your existing PBX is going to play the role of "Call Agent" in Cisco vernacular, then you should be able to deploy the 2800 routers as h.323 gateways to your siemens system. You want to allow for the proper DSP resources in the routers to allow branch access to PSTN.
We do not use a Siemens phone system, but be warned that integrating non-voip systems (PBX) to a VOIP system is not 100%. You will always have some problems (i.e. forwarding, transferring, dialing, etc). I have colleges at other companies that can also agree with this.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...