I am not sure if this is possible, bearing in mind that your mobile users whilst out in the big bad world will be using the mobile provider's network to route calls - not your own. (unless you network is insanely big).
It is possible to control the cost of mobile calls when in the office however, there are products available such as installing your own private gsm base station and having the mobiles connect to this whilst on site.
There may be a cheeky workaround actually. In the UK, one of our providers (o2) offers a family bolt-on that offers free calls between configured numbers (that are o2 only). What if you installed a gsm gateway and integrated it with CUCM and Unity. Add this central gsm number to your users' bolt-on service and they can call it for free (in theory). Then configure the call routing from this gsm gateway to route to Unity and set up an auto attendant to route calls or dial by extension.
It may just work, but o2 would not like it for sure.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...