NEED HELP ON VOIP MIGRATION

Question

hello,
We are upgrading our existing cisco 3640 router(with two nm-2v's with three e&m vic and one FXO vic) to cisco 3725 router from the central site. The remote site uses the same 3640 router.
Before the migration our VoIP connection from two sites works fine. Both sites used cisco 3640(two nm-2v's, three e&m vic's and one fxo vic).
After we migrated from the central site to cisco 3725 router( one nm-2v installed and two e&m vic) using the same parameters on the cisco 3640 router, we can only get a dial tone from the PBX but can't connect to the local number. We are using IOS Voice on the cisco 3725 router(central site).
Are there issues on the cisco 3725 to communicate to cisco 3640 router. Our data connection and dial-up for remote users works fine. Only the VoIP link to the remote site.
Hope you can provide inputs on this problem.
Thanks,
udimpas

Answer 1

Hi,
In addition, attached is the running configuration of ther cisco 3640 router. Before migration, our VoIP works fine( both ends uses cisco3640 router with same network modules and cvoice cards). The cisco3640 router has 2 nm-2v with 3 E&M cards and 1 FXO card although the FXO has not been used.
When we migrated to Cisco3725 router on the central site( running configuration attached) using 1 nm-2v with 2 E&M voice cards and IOS Voice, we can only get a dial tone on the remote site but could not dial the local number.
During the migration we have verified that the Analog E&M Hardware is recognized by the Router using the IOS Voice software by issuing the show version command .
We have also verified that all voice ports are active and verified the E&M signaling type, Audio implementation, Start dial supervision and dial method by issuing the show voice port command. The show voice port command was issued after configuring all the parameters mentioned. This parameters are based on the current config of the Cisco 3640 router to communicate to the PBX.
We have assumed the wiring arrangement between the PBX and the voice gateway(Cisco router) to be OK, since it is already running using the Cisco 3640 router.
We have also verified that the Cisco 3725 router is communicating with the PBX. By issuing the "debug vpm signal command", the supervision signaling or the on-hook/off-hook signals are being transmitted between the PBX and the router by lifting the phone handset and dialing the extension number of the remote site. But we only got a dial tone but could not dial the local number.
We have checked if the Cisco 3725 router is sending and receiving digits to and from the PBX or if the address information (DTMF digits or Pulse Dial) is being passed between both ends by issuing the "debug vtsp dsp command". But unfortunately the router debugging output shows no signs of digits being send and received between the two devices.
Hope to have your feedback the soonest possible time.
Thanks,
udimpas