I have set up an ISDN trunk on a TN556D card and connected to a Lancom 1724 VoIP router. I can make calls and also talk with others, but I do not hear a ringback tone (nor other progress tones). Though I can hear a dial tone when entering the TAC directly.
For testing purposes I have set up the following route:
Again I can make calls but no ringback tone.
Strangely when I connect an ISDN phone to the TN556D trunk directly and dial a station I can hear the ringback tone, but no dial tone.
Do you have an idea, how I could pin down the issue to either system (Lancom or DEFINITY), or how to resolve it?
NB: I have also a TN2185B card and thought about connecting to the TN556D and testing the trunk without the Lancom. Unfortunately I was not able to set up the trunk. The idea came reading the DEFINITY Administrators Guide (555-233-506), because it mentions the two cards as an example to set up a trunk.
For testing purposes I have set up the following route:
Code:
station --> P --> La -+
B nc |
station <-- X <-- om <-+Strangely when I connect an ISDN phone to the TN556D trunk directly and dial a station I can hear the ringback tone, but no dial tone.
Do you have an idea, how I could pin down the issue to either system (Lancom or DEFINITY), or how to resolve it?
NB: I have also a TN2185B card and thought about connecting to the TN556D and testing the trunk without the Lancom. Unfortunately I was not able to set up the trunk. The idea came reading the DEFINITY Administrators Guide (555-233-506), because it mentions the two cards as an example to set up a trunk.