I am cureently trying to get modems to work over an SCCP VG224 with CallManager 7. At present the modems can recieve but cannot send. The PSTN gateway they are using is MGCP and everything is configured for Modem Pass through end to end. Has anyone seen anything like this before?
Modem passthrough doesn't seem a good idea.
Should use modem relay and H.323.
Or place FXS cards in router, end of any trouble,.
Maybe a little on the late side but... have a VG2951, VG224 CUCM 7.1.3 H323. Gas company calling inbound on DID line through VG224 and they could not connect did the changes to the port below and Gas compnay can now connect to modem, all the best.
input gain 6 <-- normally at 0
output attenuation 10 <-- normally at 0
show run and look for port
input gain 6
output attenuation 10
timeouts initial 60 <-- was already set to this
timeouts interdigit 60 <-- was already set to this
timeouts ringing infinity <-- was already set to this
description Gas Modem Line x143 <-- add a description for me