Have a newly installed * box (RH ES3, current cvs head) with a tdm04b (4-port fxo) connected to four US CO Centrex lines. Inbound calls are being handled correctly via entries shown below. However, outbound 4-digit calling (eg, sip phone dials 8125 or iax2 call dials 8125) always receives a CO Centrex message "...cannot call this number, contact your operator...". I'm 50 miles away from this system and am trying to debug this remotely. An ordinary analog phone plugged into the same zap/1 pstn line _can_ dial 8125 and have that centrex extension rings. The cli shows: -- Executing Dial("SIP/6101-0553", "Zap/1/8125") in new stack -- Called 1/8125 -- Zap/1-1 answered SIP/6101-0553 -- Hungup 'Zap/1-1' Any thoughts on what might be happening here, or how to diagnose the issue? zapata.conf context=inbound-fxo switchtype=national signalling=fxs_ks echocancel=yes echotraining=800 echocancelwhenbridged=no usecallerid=no hidecallerid=no callwaiting=no callwaitingcallerid=no threewaycalling=no rxgain=0.0 txgain=0.0 callgroup=2 immediate=yes callprogress=no musiconhold=default channel => 1 extensions.conf [from-sip] include => outgoing-calls include => local-extns include => misc-extns [outgoing-calls] exten => _81XX,1,Dial(Zap/1/${EXTEN}) exten => _81XX,102,Dial(Zap/2/${EXTEN}) [inbound-fxo] exten => s,1,Dial(Sip/6101,15,r)