We bought an ATA 192 device to replace an existing two analog phonelines that are used to transmit encryption keys between two modems in our network. We have configured the ATA 192 device as recommended by CISCO manual. We can hear the phone dialing and see the dialed number but no data is transmitted between modems.
I have exported a log debagging file and I looked at the SIP protocol while calling both 1991 and 1992 phone lines.
The SIP events look good, the invite, trying and acknowledgement messages/transaction happened with no problem as you see in the screenshot and I have attached a log file if you want to look at below. As I have mentioned before there is something broken between the two modems KMF server in one location and KMF Client in another location.
Normally the CD LED “Carrier Detect LED” lights when the modem detects a valid carrier signal from another modem and this is not happening. Synchronization or Baud Rate can also cause this issue:



Please let us know if we must do something else in the config or this device is not adequate to be used for data transmission?