The requirement is to extend the extensions of EPABX to two different locations. I have deployed a solution, using Quintum A800 (3 boxes) and I have used IP port mapping. Each location is 7 Kms from one another and OFC is been used to interconnect the three location.
The system has been working perfectly for 3 years. Since a week, I have been experiencing certain problems.
1. Intermittent Echo on the line
2. I can hear ringing, but the call does not connect.