I brough up an office in Pune India about two years ago using a 1760v router with FXOs and CCM 4.0.2a, the 1760v router was configured as an H.323 gateway with analog lines to PSTN. I ran into an issue with the VIC2-4FXO module and the analog lines in India, for some reason the anlog lines in India would not work with VIC2-4FXO. The analog lines were tested fine but for some reason when I test the lines with VIC2-4FXO connected and debug enabled I was not able to see anything, it seemed like the call didn't even hit the voice port. But when I swap out the VIC2-4FXO with the VIC-2FXO everything works fine.
Has anyone had any experience with POT lines in India or China ? Are there different types of VIC modules for different part of the world ?
I have two new locations coming up (one in India and one Beijing China). I will be using POT lines to PSTN for these locations and would like to use the 4-port FXO module but affraid that I will run into the same issue that I ran into in India.
Any recommendations / suggestions is very much appreciated !!