Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Connection to the PBX

hi

I am working on connecting a 3745 gateway router to the PBX to do Voip for 10 new locations. What card do i need to purchase to interface the Lucent phone switch. What are my options?

thanks

1 REPLY
Silver

Re: Connection to the PBX

Depends on the PBX and what interface cards it supports. For analogue inbterfaces, you can use FXO, FXS or E&M. E&M is preferable as it was designed for interfacing between PBXs and other devices and gives answer and disconnect supervision.

For digital, you can use CAS or PRI. PRI is preferable as it is a stateful protocol and it gives an indication of the progress of the call, full answer and disconnect indication and call clearing codes.

87
Views
0
Helpful
1
Replies
CreatePlease login to create content