[cisco-voip] router to router (SCCP/h323 to SIP) calls don't work in SRST

Lelio Fulgenzi lelio at uoguelph.ca
Sat Mar 27 16:40:35 EDT 2010


Thanks Nick. There were four things I needed to do to make things work (got some help from the forums): 

    • allow h323 to sip connections 
    • add the codec on the inbound call leg 
    • add the codec on the outbound call leg 
    • add the dtmf-relay on the outbound call leg 

I'm totally on-board for making any changes on the terminating router, but I am curious about making the changes on the originating router. 

Let's say the two routers belonged to different organizations...is it normal for this type of information to be passed pre-configuration, i.e. what codec and dtmf relay is needed? 

I'm also wondering what I might be breaking with the "dtmf-relay" command. And what I might break if I add other commands. For example, modem passthrough. 

I'm guessing I might have to make a more specific outbound dial-peer for just those 3 unity express ports on the other router. 



on the terminating router: 

! 
voice service voip 
allow-connections h323 to sip 
! 
dial-peer voice 11112 voip 
codec g711ulaw 
plus normal stuff 
! 


on the originating router: 

! 
dial-peer voice 11111 voip 
plus normal stuff 
dtmf-relay h245-alphanumeric 
codec g711ulaw 
! 



--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
Cooking with unix is easy. You just sed it and forget it. 
- LFJ (with apologies to Mr. Popeil) 


----- Original Message ----- 
From: "Nick Matthews" <matthnick at gmail.com> 
To: "Lelio Fulgenzi" <lelio at uoguelph.ca> 
Cc: "cisco-voip voyp list" <cisco-voip at puck.nether.net> 
Sent: Saturday, March 27, 2010 4:15:10 PM GMT -05:00 US/Canada Eastern 
Subject: Re: [cisco-voip] router to router (SCCP/h323 to SIP) calls don't work in SRST 

Technically you should be able to point it at the other CME, and that 
is what I would do. Make sure on router B you have the proper 
incoming dial peer, outgoing dial peer, and that you have 
allow-connections for h323-to-sip, etc. 

-nick 

On Fri, Mar 26, 2010 at 10:16 PM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote: 
> ok, after some more reading, it looks like the default inbound dial peer 
> won't work with SIP calls. 
> 
> which makes more sense, the configuration should really happen on the 
> terminating router, not the originating router. 
> 
> thanks to Ed for some pointers. 
> 
> --- 
> Lelio Fulgenzi, B.A. 
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
> Cooking with unix is easy. You just sed it and forget it. 
> - LFJ (with apologies to Mr. Popeil) 
> 
> 
> ----- Original Message ----- 
> From: "Lelio Fulgenzi" <lelio at uoguelph.ca> 
> To: "cisco-voip voyp list" <cisco-voip at puck.nether.net> 
> Sent: Friday, March 26, 2010 7:59:55 PM GMT -05:00 US/Canada Eastern 
> Subject: Re: [cisco-voip] router to router (SCCP/h323 to SIP) calls don't 
> work in SRST 
> 
> ya know, I think I just answered my own question after sending this off.... 
> 
> i'm guessing I need a more specific dial-peer on the far end router which 
> more closely matches the dial-peer on local router. 
> 
> so, something like this? the question is, can i use the router address or 
> should i use the CUE ip address? 
> 
> hmmm, something to try later 
> 
> ________________________________ 
> Router A: 
> ! 
> dial-peer voice 37063 voip 
> description Cisco Unity Express AutoAttendant (Default) 
> destination-pattern 37063 
> session protocol sipv2 
> session target ipv4:10.104.13.66 
> dtmf-relay sip-notify 
> codec g711ulaw 
> no vad 
> ! 
> dial-peer voice 11111 voip 
> description Wild Card to vgw-jnhn-b 
> destination-pattern [1234567].... 
> session target ipv4:10.104.13.202 
> ! 
> dial-peer voice 37000 voip 
> description SIP Wild Card to vgw-jnhn-b 
> destination-pattern 37... 
> session protocol sipv2 
> session target ipv4:10.104.13.202 (OR CUE IP address?) 
> dtmf-relay sip-notify 
> codec g711ulaw 
> no vad 
> ! 
> ________________________________ 
> 
> 
> ----- Original Message ----- 
> From: "Lelio Fulgenzi" <lelio at uoguelph.ca> 
> To: "cisco-voip voyp list" <cisco-voip at puck.nether.net> 
> Sent: Friday, March 26, 2010 7:53:10 PM GMT -05:00 US/Canada Eastern 
> Subject: [cisco-voip] router to router (SCCP/h323 to SIP) calls don't work 
> in SRST 
> 
> Does anyone know if there is anything special you have to do to make calls 
> from an SCCP phone on one SRST router to a SIP endpoint on another SRST 
> router work? 
> 
> Here's what I have and can do: 
> 
> two routers in SRST mode 
> all phones register properly, some to one router, some to another 
> I can make a call from phone A on router A to phone B on router B (and vice 
> versa) 
> I can make a call from phone A on router A to Unity Express A on router A 
> and be transferred to phone B on router B 
> 
> I can NOT place a call from phone A on router A to Unity Express B on router 
> B. 
> 
> I'm pretty sure Router B is getting the call, because a "debug voice 
> dialpeer all" started spewing out stuff on Router B like it was going out of 
> style. It even showed matches. I can post the full debug next week, but just 
> thought there would be a quick(?) answer. 
> 
> I think these are the relevant configs, but will post more if needed: 
> 
> ________________________________ 
> Router A: 
> ! 
> dial-peer voice 37063 voip 
> description Cisco Unity Express AutoAttendant (Default) 
> destination-pattern 37063 
> session protocol sipv2 
> session target ipv4:10.104.13.66 
> dtmf-relay sip-notify 
> codec g711ulaw 
> no vad 
> ! 
> dial-peer voice 11111 voip 
> description Wild Card to vgw-jnhn-b 
> destination-pattern [1234567].... 
> session target ipv4:10.104.13.202 
> ! 
> ________________________________ 
> Router B: 
> ! 
> dial-peer voice 37073 voip 
> description Cisco Unity Express AutoAttendant (Default) 
> destination-pattern 37073 
> session protocol sipv2 
> session target ipv4:10.104.13.70 
> dtmf-relay sip-notify 
> codec g711ulaw 
> no vad 
> ! 
> dial-peer voice 11111 voip 
> description Wild Card to vgw-jnhn-a 
> destination-pattern [1234567].... 
> session target ipv4:10.104.13.201 
> ! 
> ________________________________ 
> 
> 
> 
> 
> --- 
> Lelio Fulgenzi, B.A. 
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
> Cooking with unix is easy. You just sed it and forget it. 
> - LFJ (with apologies to Mr. Popeil) 
> 
> 
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