Digium, Inc. Page 50
Chapter 3: Configuration
Third Example: PRI
By configuring the card for a T1 PRI line in system.conf, you acquire 23
bearer (B) channels for voice on the first 23 channels, and 1 delta (D)
channel for signalling information on the 24th channel. In the
chan_dahdi.conf file, define pri_cpe as the signalling type to act as the
client side. Define the switch type you are connecting to as national. You
will then have 23 voice channels for Asterisk.
PRI T1:
/etc/dahdi/system.conf:
loadzone = us
defaultzone = us
span = 1,1,0,esf,b8zs
bchan = 1-23
dchan = 24
echocanceller = mg2,1-23
/etc/asterisk/chan_dahdi.conf:
group = 1
echocancel = yes
signalling = pri_cpe
switchtype = national
context = incoming
channel = 1-23
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