[asterisk-users] IXJ issues on 1.4.35

[Infra]

My thanks for previous help on fixing IXJ issues in 1.2.40; I now
have problems with a just-built 1.4.35 on the same host:

[Aug 18 17:26:48] WARNING[27209]: app_dial.c:1298 dial_exec_full: Unable
to create channel of type 'Phone' (cause 0 - Unknown)
  == Everyone is busy/congested at this time (1:0/0/1)

O/S: Linux 2.4.27; IXJ driver for Linux Rev. 3.5, gcc 3.01

I applied the patch for dialtone as per my issue on 1.2.40.

Build log contains no warnings for chan_phone.

Build tested using install to DESTDIR=/tmp/asterisk; make samples;
edited 'extensions.conf' to uncomment extension '1265' (Phone/phone0);
added skinny extension to test Cisco 7920 (which worked except for
audio stalling):

exten => 1266,1,Dial(Skinny/1266 at 7920-1)
exten => 1266,n,Goto(s,5)

Asterisk started with -vvv -C /tmp/asterisk/etc/asterisk/asterisk.conf
and controlled from 'asterisk -r'

What other debugging should I enable?

Again, all help is much appreciated.

Michael