ISDN BRI (Audiocodes Mediant 1000) Noise when calls done via PSTN RRS feed

  • Question

  • Hi,

    I'm in the process of installing a Mediant 1000 at one of our branch offices, however i've run into an issue with the sound quality when calling in from the PSTN, internal calls works fine (and great quality). (have tested calls to Exchange UM, and Lync EV user).

    There is a lot of noise on the line when the call has been picked up, to the point where it's almost impossible to hear the other person.

    My first thought was the Codec, it was already set to A-law (it's in EMEA), but i've tried changing it to ULaw, just to be sure.

    Silence suppression, AGC etc is turned off, the old telephone central worked just fine so i expect it to be a setting on the BRI trunk.

    (they have 5 BRI-2).

    Any ideas ?

    Wednesday, July 4, 2012 4:29 PM