merhabalar,
gw <-----> gsm channel bank(viliant)
baglantisinda callari gsm uzerine gondermiyorum, yardimci olabilecek arkadas varmidir, tesekkurler...... konfig dosyam:

controller E1 3/0
ds0-group 1 timeslots 1-15,17-31 type r2-digital

voice-port 3/0:1
input gain 6
echo-cancel coverage 16
compand-type a-law
cptone TR
timeouts interdigit 2
timeouts ringing infinity

dial-peer voice 1 pots
destination-pattern 8255#90T
port 3/0:1
!
dial-peer voice 2 voip
preference 1
incoming called-number 8255#90T
codec g729r8
bearer-cap Speech