Our client is using CME 4.1 with ISDN E1 Pri connected to PSTN, the client bought a software to record all calls both internally and externally. When calls are done internally they are recorded perfectly, but calls to/from PSTN are recorded with a lot of noise, the software provider said that they need U-LAW codec to have a noise free recoding.
I changed the recording on ISDN interface using the Compand-Type to U-LAW, doing so degraded the whole telephony system quality.
is there is a way to convert to make U-LAW the global codec used by CME.
Thanks a lot