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We have working Cisco 2610 router with VIC2-2BRI for PSTN gateway
for our PBX. the PBX and the router communicate with SIP.

We have PSTN number block and would like to map these to SIP
numbers to our PBX, we now redirect everything to 6030.

--
voice-port 1/0/0
compand-type a-law
no comfort-noise
cptone NL
connection plar 6030
bearer-cap Speech
!
voice-port 1/0/1
no comfort-noise
cptone NL
connection plar 6030
bearer-cap Speech
!
dial-peer voice 1001 voip
destination-pattern 6030
session protocol sipv2
session target ipv4.x.x.x:5060
session transport udp
dtmf-relay sip-notify
codec g711ulaw
no vad
--

How to map 020-1001001 to sip number 1001 on the PBX?

020-1001001 to 1001
020-1001002 to 1002
020-1001003 to 1003