DAHDI Fails to Configure ISDN BRI d-channels

Problem

When DAHDI 2.3 of Elastix 1.6 or Elastix 2.0 is used, DAHDI fails to configure ISDN BRI d-channels, and the following error message is received:

Astribanks initialization is done

Running dahdi_cfg: DAHDI_CHANCONFIG failed on channel 3: Invalid argument (22)

Did you forget that FXS interfaces are configured with FXO signalling and that FXO interfaces use FXS signalling?

[FAILED]

Solution

The problem will be fixed in the upcoming PaloSanto release of DAHDI 2.4 for Elastix. As a workaround it is possible to edit the /etc/dahdi/system.conf file and define the d-channels as 'dchan' instead of 'hardhdlc'.

For example, instead of:

span=1,1,0,ccs,ami

# termtype: te

bchan=1-2

hardhdlc=3

echocanceller=oslec,1-2

you should define:

span=1,1,0,ccs,ami

# termtype: te

bchan=1-2

dchan=3

echocanceller=oslec,1-2