extensions.conf
[2201]
exten => _XXXX,1,NoOp(line1)
<------>same => n,MixMonitor(/mnt/sdb1/records/${CALLERID(num)}_${EXTEN}_${STRFTIME(${EPOCH},MSK-3,%Y%m%d-%H%M%S)}.wav,b)
<------>same => n,Dial(SIP/317&SIP/318&SIP/100,10,itT)
<------>same => n,Hangup

[2202]
exten => _XXXX,1,NoOp(line2)
<------>same => n,MixMonitor(/mnt/sdb1/records/${CALLERID(num)}_${EXTEN}_${STRFTIME(${EPOCH},MSK-3,%Y%m%d-%H%M%S)}.wav,b)
<------>same => n,Dial(SIP/317&SIP/318&SIP/100,10,itT)
<------>same => n,Hangup


sip.conf
register => 2201:XXXXX@285110.17.rt.ru/2201
register => 2202:XXXXX@285110.17.rt.ru/2202

[rt](!)
type=friend
qualify=300
canreinvite = no
insecure=port,invite
host=285110.17.rt.ru
fromdomain=285110.17.rt.ru
dtmfmode=rfc2833
disallow=all
allow=alaw
call-limit=1
registersip=yes

[2201](rt)
username=2201
defaultuser=2201
secret=XXXXX
fromuser=2201
context=2201

[2202](rt)
username=2202
defaultuser=2202
secret=XXXXXX
fromuser=2202
context=2202