You can troubleshoot voice quality issues that are related to the PSTN as follows:
- Perform test calls between an Office Communicator 2007 R2
client and a PSTN telephone.
Serverto identify which Mediation Servers and IP/PSTN gateways
were used and how other calls through the corresponding Mediation
- View the server health report in Monitoring Server Reporting
Console to see trends of call quality at each Mediation Server over
- Rule out codec configuration issues, Secure Real-time Transport
Protocol (SRTP), and other IP/PSTN gateway compatibility issues.
For details about gateway configuration, see
in the Planning and Architecture
documentation. For issues that appear to be associated with the
IP/PSTN gateway, consult the gateway vendor to verify your