Hello: I’m new to this forum and new to Asterisk. We have implemented an Asterisk based IP PBX sold to us through an IP PBX vendor. We continue to have terrible call quality. To date, we have been unable to locate the source of the problem/s in order to correct them. I would truly appreciate any feedback emailed to me, etc. from someone willing to read the following summarization of our configuration and offer any advice:
We have the following:
T1 1.5Mbs up/down with a newer Cisco rack mount T1 router. T1 provider shows zero packet loss/drop on their end when viewing their reports.
Dratek Vigor 3300 series VOIP router; we’ve tried both enabling and disabling the Qos function of this router/firewall.
IP PBX server with Pentium 4 CPU, 1Gb RAM and Digium TDM400 analog PCI card. Inbound calls come in through the analog PCI card or SIP lines depending on inbound DID #. All outbound calls are VOIP through a SIP provider (SIP lines purchased through IP PBX vendor).
Polycom 601 hard phones and Counterpath softphones (quality issues same on both)
IP PBX vendor says problem is with T1 provider and T1 provider says problem is with our configuration.
I realize their is certainly more information necessary for anyone to help offer a diagnosis so I apologize in advance for not being more descriptive or helpful in providing such info. emails, etc would be appreciated.
Please help with any advice. Thank you.