OK...that is correct. This is straight from Cisco's page on the ATA: Name Signaling Event based passthrough Name Signaling Event (NSE)-based passthrough is simply thet transport of fax or modem communications using the G.711 codec. The ATA 187 d...
I am pretty sure that nse modem passthrough is not supported on the ATA187, which is primarily the reason for their demise. all of the new VG's DO support nse modem passthrough.
I would also recommend that you enable debugging of the appropriate type in your voice gateway (i.e. Q931, SIP, etc.) to see if the carrier is rejecting your calls, perhaps due to unavailable channel, improper signalling, etc.
Revere; I have a slightly different setup, but I will show you what I have done to acheive something similar to what I believe you are desiring. I have a customer in France, that wants to play a greeting and wait on user input. If the user c...