My company just acquire a new company and we have to integrate their phone system into ours immediately. The problem is they have an old PBX (over 10 years old) . We were thinking into adding an E&M card to their PBX and built a trunk between both systems.
At the moment I am running into two issues and looking for advices:
- I had never setup an E&M trunk before and I am looking for best ways to built it. IP connectivity will not be an issue as we are adding a new router on site to help out (the new company is not too far from one of our remote sites).
- They have a 3 digit dial plan and we have 4 digit dial plan. We were thinking assigning each user
(less than 30) a new DN and translates each of them since the migration would be progressive from the old PBX to CUCM. Like that when we convert a user we can just remove the translation.