[kphone-users] One way audio

[<mo...@be...>]

Hello all,

 I've recently begun experimenting with Asterisk and kphone. I'm having
 trouble and would appreciate any suggestions the list can provide.

 My setup is:

 Asterisk version 1.0.8 running on an AMD Athlon XP3000 system with
 Gentoo Linux.

 The Asterisk config is mostly the generic demo config that comes with
 the install.

 The current version of kphone is version 4.2 installed on a fresh
 Fedora Core 4 system on a Dell laptop. The 4.2 version of kphone was
 downloaded as source and compiled with "./configure; make; make
 install".

 I've added a section to the asterisk /etc/asterisk/sip.conf file for a
 kphone user as:

 [kphone]
 type=friend
 host=dynamic
 dtmfmode=inband
 secret=blahblahblah


 Both the asterisk server and the laptop running the kphone client are
 on the same local LAN, plugged into the same switch. There is no
 iptables or other firewall software installed on either box.

 Asterisk sees kphone register when kphone is started from the laptop as
 is indicated by the message in the Asterisk console:

 -- Registered SIP 'kphone' at 200.200.200.123 port 5060 expires 900

 I can call the demo echo-test application from kphone by entering
 "sip:600@200.200.200.201" in the "Remote:" box.

 I hear the audio coming from the Asterisk server on the laptop.

 It doesn't appear that the voice audio from the laptop is making it
 back to the Asterisk server, as I never hear anything echoed back to
 me. If I bring up the DTMF pad in kphone, and hit buttons, I *do* hear
 the DTMF tones echoed back.

 I have verified with both 'alsamixer' and 'aumix' that the microphone
 is *NOT* muted and that the correct mic input is selelected. 

 If I put on a pair of headphones, and turn up the mic gain through
 alsamixer, I can hear my own voice local to the laptop whether kphone
 and a call to the echo test extension on Asterisk is running or not. I
 can record my own voice through both the built-in mic and an external
 mic plugged into the mic jack on the laptop with a sound recorder
 application, so I feel pretty sure that the mic hardware is working.

 I have tried several versions of kphone prior to the 4.2 version
 compling them with the same 3-step process (configure;make;make
 install). I have checked out and compiled the version that was in CVS
 as of 10/08/05 and had the same results. I can hear audio, but can't
 send it.

 The same thing happens if I call the voicemail application in Asterisk
 and attempt to leave voicemail for a user. Asterisk quits recording
 after 10 seconds because it only detects silence.

 Anyone have any ideas or suggestions?  I'm happy to post or provide any
 other details you might think helpful.

 Thanks,

-- 
	-Monte