Poor Line quality

[jsauve]

HI, I have experienced some issues with low volume on out and in bound calls. The sites in question use 9620 phones, with a few cordless and desktop analouge phones. Mulitple sites via MPLS connection to London. The sites are a mix of analogue trunks (multi BT analouge lines) and isdn trunks. Of say 30 sites, only 5 sites have issues with the volume of the calls (sometimes muffled sounds) only on the 9620 phones, the analouge phones are always clear. All the normal setup is checks, codecs, maping, udp ports, terminal, and all are correct. There is no difference in the setup of these poor 5 sites to the 25 that are clear. The only thing to mention is these 5 sites are all analogue trunking sites. We have moved the sites in to local mode but this did look to resolve the issue (showing to be a network issue) but aftet a few days the problem returned. The Switchs POEs that the phones connect to had the VLAN to the voice stopped from the main server, but I think the fact these POE's still had data VLAN setup on this, meant that the network was still effected in someway, but I am not sure now how to provde this. My traces do not show anything to concern with jitter or packet loss...any suggestions Please

 

[avayasmith]

you could try playing with the table on page 3 of "location-parameters", giving the trunks in question a different loss plan that bumps up the volume. The lower the number (16 is the lowest i think) the higher the volume.


i prefer clarity to agreement - dennis prager