[Freeswitch-users] Need help with FreeTDM config
david at harktech.com
Sat Apr 7 19:35:16 MSD 2012
I am writing an application that uses FreeTDM with a Digium TE-220 Dual
T1 card. I started by looking at the testanalog sample and found that I
also needed to add ftdm_global_configuration after ftdm_global_init. I
am now able to place a call, but I get a segfault early on referencing
I am using an Adtran TSU600e for a channel bank and have a mixture of
FXS and FXO cards in it. Right now I am just testing with a phone
plugged into an FXS port configured for TANDEM_LS. The T1 is configured
AMI/D4 for channelized T1 with robbed bit signalling. The T1 is up and
I have no alarms.
There isn't a lot of information on the FreeSWITCH Wiki or on the
Sangoma FreeTDM Wiki for T1 RBS. There is one mention that I should use
channel type of fxo-channel or fxs-channel for RBS (
http://wiki.freeswitch.org/wiki/FreeTDM ). I saw another place that
says to use em-channel, but it may be specific to running Dahdi on
Sangoma cards ( http://wiki.sangoma.com/FreeSWITCH-Dahdi-Mode ).
I have tried both configurations, but have gotten further with the
fxo-channel config than with the em-channel config.
With the channel set to fxo-channel I get a segfault when I place a call
and the first sigmsg->channel is referenced.
I can open a Jira and add backtraces, but I wanted to check if I
probably had a configuration issue first.
E&M configuration I tried:
[span zt tsu600e]
trunk_type => EM
em-channel => 1-4
;fxo-channel => 1-4
;fxs-channel => 5-6
;fxo-channel => 9-12
FXO config I tried:
[span zt tsu600e]
fxo-channel => 1-4
Channel 1-4 is really an FXS card. I am using the reverse like I used
to with Asterisk. Not sure if it is correct or not.
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