Inbound SIP Trunk Call Failing with 1751 No ars/aar Route

[wallot]

Hi folks, I'm having another quandary.

On an inbound SIP trunk call, I'm stripping +1 and area code sending the 7 digit extension url to CM.

CM is failing with denial event 1751: No AAR/ARS route. It should be matching an extension and terminating to that extension - right?

list trace previous Page 1

LIST TRACE

time data

08:49:32 TRACE STARTED 01/10/2023 CM Release String cold-01.0.890.0-27348
08:49:37 SIP<INVITE sip:6843488@vzn.sip.uc.mil;transport=tls;user=ph
08:49:37 SIP<one;trusted;gw SIP/2.0
08:49:37 Call-ID: 6b4172c958e8f0748747cdeb4223c95d730f1a67f@172.
08:49:37 16.130.16
08:49:37 active trunk-group 200 member 187 cid 0x8d8
08:49:37 denial event 1751: No AAR/ARS route pat/pref D1=0x83000c8 D2=0x0
08:49:37 SIP>SIP/2.0 404 Not Found
08:49:37 Call-ID: 6b4172c958e8f0748747cdeb4223c95d730f1a67f@172.
08:49:37 16.130.16
08:49:37 term trunk-group 200 cid 0x8d8
08:49:37 idle trunk-group 200 cid 0x8d8
08:49:37 SIP<INVITE sip:6843488@vzn.sip.uc.mil;transport=tls;user=ph
08:49:37 SIP<one;trusted;gw SIP/2.0
08:49:37 Call-ID: 406c62c9589bb92786747cdeb560b8754ff35856e2@172


Thanks!

 

[kyle555]

display dial parameters

Are you UDP or EXT first?

display dialplan analysis

what does 6843488 match?

The call should terminate on a real phone 6843488, right?

 

[ZeroZeroOne]

I'll just list out the basics. I often find I missed something fundamental.
[ul]
[li]Dialplan Analysis - Confirm 7-digit extensions starting with 6[/li]
[li]Dialplan Parameters - Set for Extension or UDP first? If UDP first, do you have an entry that will match 6843488 to an extension? A "Generic" entry of "6" for 7-digits would suffice.[/li]
[li]Station (or VDN, etc.) - does 6843488 exist?[/li]
[/ul]

 

[ZeroZeroOne]

Kyle beat me to it!

You can also check your IP-Network-regions. If your stations are built in IP-Network-Region 1 but your trunks are in region 10, you need to specify how one region talks to another:
display ip-network-region 1 Page 4 of 20

 Source Region: 1     Inter Network Region Connection Management     I       M
                                                                     G  A    t
 dst codec direct   WAN-BW-limits   Video      Intervening       Dyn A  G    c
 rgn  set   WAN  Units    Total Norm  Prio Shr Regions           CAC R  L    e
 1    1                                                                all
 2    2     y    NoLimit                                             n       t
 3    2     y    NoLimit                                             n       t
 4    2     y    NoLimit                                             n       t
 5    2     y    NoLimit                                             n       t
 6    2     y    NoLimit                                             n       t
 7    2     y    NoLimit                                             n       t
 8    2     y    NoLimit                                             n       t
 9    2     y    NoLimit                                             n       t
 10   2     n                                  240:    :    :        n       t
 11   2     n                                  240:    :    :        n       t
 12   2     n                                  240:    :    :        n       t
 13   2     n                                  240:    :    :        n       t
 14   2     n                                  240:    :    :        n       t
 15   2     n                                  240:    :    :        n       t

You can have direct connect or an intervening region. But without a way for one region to talk to another, that could give you issues, too.