> Nitin Joshi wrote: > > Hi All, > > > > I have installed a Digium TE110P card on an Asterisk 1.2.1 system. Its > > connected directly to the PSTN. But I am unable to make outbound calls > > on the zap channels. The light on the card is green. Asterisk CLI > > shows all 24 channels when I give the command 'zap show channels'. I > > also noticed that Asterisk CLI shows an incoming call every few > > seconds on the 24th channel. This must be some kind of a timing > > signal. This is he first time I am configuring a T1 so I must have > > done something wrong I guess. > > T1s require a D (Data) channel, unless connecting to a channel bank, It > should be 23 voice 1 data. Also, I would strongly suggest moving to 1.2.4 > > Doug
Guys, A T1 is a T1: 24 channels in the US. A PRI is a service that runs on top of a T1, that is, it uses all 24 channels, but it uses a specific channel (usually the 24th channel) for signaling. It sounds very much like Nitin has a PRI - the 24th channel is seeing lots of activity which is a pretty good sign of a PRI, but not always. It could be a regular incoming call on the 24th channel of a standard digital trunk, sometimes called a "supertrunk" by some carriers. Nitin, can you confirm with your telecom carrier that you do indeed have a PRI? You need to ask them if it is a PRI circuit or a standard 24-channel digital trunk. It looks like the framing and coding are correct: B8ZS and ESF, which are typical for both PRI's and digital trunks. Finally, if it is a PRI then you'll need to know what switch type they use: National, 4ess, 5ess, DMS100, etc. Some carriers call this the "protocol variant." Here's a sample of a zaptel.conf for my PRI here in California (Qwest): loadzone = us defaultzone = us span=1,1,0,esf,b8zs # My PRI line bchan=1-23 dchan=24 Here is a sample zapata.conf with PRI, where the switch type is 5ess: [channels] language=en context=from-pstn signalling=pri_cpe switchtype=5ess rxwink=300 ; Atlas seems to use long (250ms) winks callerid=asreceived usecallerid=yes hidecallerid=no callwaiting=yes usecallingpres=yes callwaitingcallerid=yes threewaycalling=yes transfer=yes cancallforward=yes callreturn=yes echocancel=yes echocancelwhenbridged=yes echotraining=400 rxgain=0.0 txgain=0.0 group=0 callgroup=1 pickupgroup=1 immediate=no channel => 1-23 Save your existing zaptel and zapata conf files and try playing with these settings. You might just figure it out without calling the telco, although if you spend more than 15 minutes tinkering you're probably in need of telco's assistance. -MC _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
