[Asterisk-Users] Audio problem with Pingtel Xpressa phone

[Ing. Angel Gomez Garcia]

Good evening.

I have a problem with my Xpressa phone, when i dialed from/to it i don't 
get audio, my other UA are a SJPhone and XLite, i already debug it with 
ethereal and tcpdump, i dialed the echo test extension from the demo 
files of asterisk and is the same result, no audio/rtp coming from the 
Xpressa. I think the problem is with the Xpressa configuration, maybe 
something with the codecs or the RTP, but haven't been able to find it 
yet, any help will be appreciated very much.

(sip.conf)
[general]
port = 5060
bindaddr = 192.168.1.200           ;0.0.0.0
context = default
tos = lowdelay
disallow = gsm
disallow = g729

[6014]              ; pingtel xpressa
type = friend
host = dynamic
dtmfmode = inband
mailbox = 6014
qualify = 1000
canreinvite = yes

The config in xpressa is very standar and it registers with asterisk ( 
sip debug output in console ), it even shows the new messages in the INBOX,
line : 6014 at 192.168.1.200, register enable, forward disable
directory server : 192.168.1.200
authentication method : none