Hi guys, I'm running the last stable version of Freeswitch in my environment. FreeSWITCH Version 1.6.14~64bit ( 64bit) I've a very strange problem with a group of extensions of sales department An isdn pri line is provided by a cisco router (2921) through a sip trunk. When the calls volume increases, suddenly some phones experience one way audio (the customer hears, sellers don't). When it happesn the only way to get the phone back to work is to reboot it. We're running all polycom vvx 300 phones. What I've tried so far: 1. Change the codec to g.711 2. Upgrade freeswitch 3. Upgrade Polycom firmware 4. Downgrade Polycom firmware I've captured packets with wireshark packets and I can see both audio channels in the call trace. So I guessed it could be the phones but it's very strange. What do you think about it? Thanks *Gaetano VolpeCEO, CTO & Systems Analyst*g.volpe@studiofox.it *- Mob.+39.3485260691* -- <http://www.studiofox.it> *STUDIO FOX SERVICE di G.Volpe* Via Spineto, 24 - 70038 - Terlizzi (Bari) - Italy Ph. +39.0803540043 - Fax +39.0803515004 C.F. VLPGTN83E10L109S - P.Iva IT05803550721 www.studiofox.it La presente comunicazione ed i suoi eventuali allegati potrebbero contenere informazioni legate al segreto professionale o dati soggetti alla vigente Legge sulla Privacy e sono comunque strettamente riservati e confidenziali per il destinatario. In mancanza di autorizzazione è vietata la lettura, la riproduzione, la diffusione e l'estrazione di copie. Pertanto, nel caso in cui aveste ricevuto per errore la presente comunicazione, Vi preghiamo di provvedere a distruggerla e di contattare immediatamente i nostri uffici ai numeri su indicati. Grazie. This communication and its attachments, if any, may contain information covered by professional secrecy or data subject to current privacy law, and they are intended only for the use of the individual to whom it is addressed. They may contain information that is legally privileged, confidential or exempt from disclosure. Reading, reproduction, disclosure, and extraction of copies are prohibited unless expressly authorized. If you have received this communication in error, please notify immediately our offices at the contact details specified above and delete the communication without retaining any copies.