I've asterisk 1.0.7 (debian package) with zaptel 1.2-beta1 (to avoid the "rmmod hangs the server" problem already discussed here). The card is a digium TE410P, configured in this way : /etc/zaptel.conf span=1,1,0,ccs,hdb3,crc4 bchan=1-15 dchan=16 bchan=17-31 span=3,1,0,ccs,hdb3,crc4 bchan=63-77 dchan=78 bchan=79-93 span=4,1,0,ccs,hdb3,crc4 bchan=94-108 dchan=109 bchan=110-124 loadzone=it defaultzone=it (span 2 has problems at the physical level, so I've disabled it, enabling it gives the same results and a lot of red alarms) I want to group spans number 1, 2 and 3 and leave span 4 in a separate group, so : /etc/asterisk/zapata.conf [channels] language=it context=default switchtype=euroisdn pridialplan=national prilocaldialplan=national signalling=pri_cpe callerid=asreceived usecallerid=yes hidecallerid=no usecallingpres=yes echocancel=yes echocancelwhenbridged=yes rxgain=0.0 txgain=0.0 group=1 channel => 1-15 channel => 17-31 channel => 63-77 channel => 79-93 group=2 channel => 94-108 channel => 110-124 and in /etc/asterisk/extensions.conf : exten => _1001X.,1,NoOp(EXTEN: ${EXTEN}, SIPCALLID: ${SIPCALLID}) exten => _1001X.,2,SetAccount(N01) exten => _1001X.,3,Dial(Zap/G1/${EXTEN:4}) exten => _1001X.,4,Hangup But when the first span is full, no more dials are made on the other channels, and if I use g2 (tied to 1002 prefix in the same way) I get a "can't create zap chan, everyone is busy/congested) If I Dial(Zap/3-63/${EXTEN}) for test I get an "unknown option -" ... isn't that the syntax to dial a specific chan on a specific span ? I looked everywere in the wiki and all seems to confirm the correctness of my config files, but clearly something must be wrong ... (when I start asterisk it shows the setup for all the channels, also zap show channels shows them all)