We're trying to get headsets to work with the 7960s and are using some Plantronics H81 headsets - for PSTN calls they work great. But when calls stay within our network (either VoIP-VoIP or VoIP-LegacyPBX calls we get severe self-echo (each party hears themselves on an echo). THis happens even if only one end has the headset on - and again only on low-cost routes that don't hit the PSTN.
Is this a gain/hot line/decibel issue - might the headsets need to be fancier to adjust for some differences in calling internally or externally?
What headsets (part numbers if possible :-) are you all useing successfully with the phones - and do you use external amps/mixers/gain adjuster boxes or just plug into the phone? (Ours are just plugged into the phone).
- Ken
