Help whit dial-peer behavior.

[Rafael Jimenez]

there are two siemens pbx at remote sites.
1. the pbxs communicate between them via cisco routers.
2. between the pbx and routers the protocol used is QSIG, with E1..
3. only one of the PBX (PBX A) is connected to the PSTN with E1 R2 CAS.

Calls coming from the PSTN to an extension on the remote PBX (PBX B), the call enters the pbx A, passes it to cisco router A via QSIG. the router A receives and sends the call to the remote router B. The router B send the call via QSIG to the pbx B.

PSTN <--E1R2CAS-> PBX-A <-QSIG-> RouterA <-LAN-> RouterB <-QSIG-> PBX-B-> ANALOG-PHONES

The PBX A, also serves their own phones.

this configuration is working well for over 8 years. both routers are owned by the LAN/WAN carrier.

I'm looking at the possibility of changing everything to cisco unified communication manager.

I reviewed the configuration of the router A, I do not see any inbound dial-peer type pots configured to receive calls coming from the PSTN to the PBX B via PBX A.
The only pots dial-peers configured are the those for outbound calls coming in the opposite direction (from PBX B to PSTN).
for example:
! dp in router A
dial-peer voice 100 pots
 description outbound to pbx A dp (PBX-B phones to PBX-A phones).
 destination-pattern 30..
 port 0/1/0:15
 forward-digits all
!
both routers are using ios 12.4. there are no direct-inward-dial configured on the routers.

The question I have is:
in the absence of a inbond pots dial-peer match in Router A (PBX A <-> Router A), which criteria is used for the match?
The port, no matter the destination-pattern,
or dial-peer 0?.

thanks.

[acampbell]

Hi,

Have a look at this link:-
http://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/14074-in-dial-peer-match.html

It will match the port on your POTS dial peer

Regards
Alex

[Rafael Jimenez]

Hi,

its true if in a voip dial peer  with incoming-called number do not require target session ?.

Thanks.

[acampbell]

Hi Rafael,

When a call is RECEIVED via QSIG on router A from PBX=A

2 dialpeer will be matched

DP 100 as the incoming DP because it matches port port 0/1/0:15
There must be a matched DP but VOIP this time pointing through
the LAN to router B this will be matched by its "destination-pattern"

On the voip dial peer you will probably see
"incoming called-number"

e.g. Something like:-

!
dial-peer voice 10 voip
 description  *** VOIP TO ROUTER B ***
 preference 1
 destination-pattern 40..
 incoming called-number .
 voice-class codec 1
 voice-class h323 1
 session target ipv4:10.10.10.10
 dtmf-relay h245-alphanumeric
 ip qos dscp ef media
 ip qos dscp cs3 sig
 no vad
!

The "incoming called-number ." can be (probably) used
for incoming IP call set ups DP matching from the PBX B

Make a test call and then issue

show call active voice brief

look at the PIDs these are the matched DP numbers

Hope this helps
Regards
Alex