1750 router at the remote site with FXO connected to a PABX system. When we command csim start
from the remote router to dial an analog line to the HQ. The phone rings. But when we
dial from an analog line at the remote site to HQ we hear a fast busy tone.
Using a 2650 remote router with FXO with same set up and config with 1750. The call from an
analog phone from remote site would push thru.
Is it a hardware issue or an IOS issue? why is it working with 2650 and not on 1750?