Re: [cisco-voip] Anti-Tromboning Tie Lines to PBX

[Anthony Holloway]

I think I just found a road block to using this feature in an environment
with UCCX.

According to the UCCX Release Notes, you cannot enable QSIG Path
Replacement.

*Signaling (QSIG) Path Replacement (PR).*

*This feature must be disabled when Unified CCX is deployed. To disable
this feature, set the Unified Communications Manager service parameters
Path Replacement Enabled and Path Replacement on Tromboned Calls to
False.  *

On Tue, Mar 7, 2017 at 4:54 PM Anthony Holloway <
avholloway+cisco-v...@gmail.com> wrote:

> I'm not sure how often this gets configured out in the wild, but I do know
> that there are few different flavors of this feature, depending on your
> scenario.  E.g., CUBE Media Anti-Tromboning
> 
>
> The one I'm interested in would involve a tie line to a legacy PBX, and
> I'm not married to the IP technology: SIP, H323, MGCP, whichever will get
> the job done.
>
> CUCM ---IP---> VGW ---T1/PRI---> PBX
>
> The call scenario I'd like to see if we can avoid is when a call is
> established from CUCM to the other PBX, and then a phone on the far side
> transfers the call to an IP Phone on the CUCM side, I'd like the PRI usage
> to drop to 0 trunks in use, instead of nailing up 2 trunks for the duration
> of that call.
>
> I'm looking for your experience and feedback in configuring
> anti-tromboning in this scenario.  One of the hardest parts in researching
> this, is knowing what terms to search for.  I think I've narrowed down the
> terminology to QSIG Path Replacement, as described in the CUCM SRND
> 
> .
>
> Though, without real-world working experience, it's hard to know if I'm
> right or not.
>
> So, I know there's some good legacy telco knowledge out on this list.
> What do you know?  Thanks!
>
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Re: [cisco-voip] Anti-Tromboning Tie Lines to PBX

[Carlo Calabrese via cisco-voip]

I found the link. it has what needs to be changed in the PBX and what is needed 
on the gateway and in the gateway configs on CUCM.
http://www.cisco.com/c/en/us/solutions/collateral/enterprise/interoperability-portal/712433.pdf

Carlo 

On Thursday, March 9, 2017 7:43 AM, Carlo Calabrese via cisco-voip 
 wrote:
 

 QSIG with MGCP. I use this to connect to a few Nortel PBX's. The main reason 
was to get rid of Meridian Mail and put it on Unity.  Started this bad in the 
4.2 days. When the call transfers out it will release the channels and the PRI 
is no longer in the call.Easy to set up. just a couple of configs on the 
gateway and a few options changes on the PBX. Cisco has a document on it 
somewhere. I am trying to find it on my PC, but that was 10 years ago. 

On Tuesday, March 7, 2017 3:25 PM, Brian Meade  wrote:
 

 Also known as 2 B-channel Transfer or TBCT (should help your searching).
On Tue, Mar 7, 2017 at 5:54 PM, Anthony Holloway 
 wrote:

I'm not sure how often this gets configured out in the wild, but I do know that 
there are few different flavors of this feature, depending on your scenario.  
E.g., CUBE Media Anti-Tromboning
The one I'm interested in would involve a tie line to a legacy PBX, and I'm not 
married to the IP technology: SIP, H323, MGCP, whichever will get the job done.
CUCM ---IP---> VGW ---T1/PRI---> PBX
The call scenario I'd like to see if we can avoid is when a call is established 
from CUCM to the other PBX, and then a phone on the far side transfers the call 
to an IP Phone on the CUCM side, I'd like the PRI usage to drop to 0 trunks in 
use, instead of nailing up 2 trunks for the duration of that call.
I'm looking for your experience and feedback in configuring anti-tromboning in 
this scenario.  One of the hardest parts in researching this, is knowing what 
terms to search for.  I think I've narrowed down the terminology to QSIG Path 
Replacement, as described in the CUCM SRND.
Though, without real-world working experience, it's hard to know if I'm right 
or not.
So, I know there's some good legacy telco knowledge out on this list.  What do 
you know?  Thanks!
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Re: [cisco-voip] Anti-Tromboning Tie Lines to PBX

[Carlo Calabrese via cisco-voip]

QSIG with MGCP. I use this to connect to a few Nortel PBX's. The main reason 
was to get rid of Meridian Mail and put it on Unity.  Started this bad in the 
4.2 days. When the call transfers out it will release the channels and the PRI 
is no longer in the call.Easy to set up. just a couple of configs on the 
gateway and a few options changes on the PBX. Cisco has a document on it 
somewhere. I am trying to find it on my PC, but that was 10 years ago. 

On Tuesday, March 7, 2017 3:25 PM, Brian Meade  wrote:
 

 Also known as 2 B-channel Transfer or TBCT (should help your searching).
On Tue, Mar 7, 2017 at 5:54 PM, Anthony Holloway 
 wrote:

I'm not sure how often this gets configured out in the wild, but I do know that 
there are few different flavors of this feature, depending on your scenario.  
E.g., CUBE Media Anti-Tromboning
The one I'm interested in would involve a tie line to a legacy PBX, and I'm not 
married to the IP technology: SIP, H323, MGCP, whichever will get the job done.
CUCM ---IP---> VGW ---T1/PRI---> PBX
The call scenario I'd like to see if we can avoid is when a call is established 
from CUCM to the other PBX, and then a phone on the far side transfers the call 
to an IP Phone on the CUCM side, I'd like the PRI usage to drop to 0 trunks in 
use, instead of nailing up 2 trunks for the duration of that call.
I'm looking for your experience and feedback in configuring anti-tromboning in 
this scenario.  One of the hardest parts in researching this, is knowing what 
terms to search for.  I think I've narrowed down the terminology to QSIG Path 
Replacement, as described in the CUCM SRND.
Though, without real-world working experience, it's hard to know if I'm right 
or not.
So, I know there's some good legacy telco knowledge out on this list.  What do 
you know?  Thanks!
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Re: [cisco-voip] Anti-Tromboning Tie Lines to PBX

[Brian Meade]

Also known as 2 B-channel Transfer or TBCT (should help your searching).

On Tue, Mar 7, 2017 at 5:54 PM, Anthony Holloway <
avholloway+cisco-v...@gmail.com> wrote:

> I'm not sure how often this gets configured out in the wild, but I do know
> that there are few different flavors of this feature, depending on your
> scenario.  E.g., CUBE Media Anti-Tromboning
> 
>
> The one I'm interested in would involve a tie line to a legacy PBX, and
> I'm not married to the IP technology: SIP, H323, MGCP, whichever will get
> the job done.
>
> CUCM ---IP---> VGW ---T1/PRI---> PBX
>
> The call scenario I'd like to see if we can avoid is when a call is
> established from CUCM to the other PBX, and then a phone on the far side
> transfers the call to an IP Phone on the CUCM side, I'd like the PRI usage
> to drop to 0 trunks in use, instead of nailing up 2 trunks for the duration
> of that call.
>
> I'm looking for your experience and feedback in configuring
> anti-tromboning in this scenario.  One of the hardest parts in researching
> this, is knowing what terms to search for.  I think I've narrowed down the
> terminology to QSIG Path Replacement, as described in the CUCM SRND
> 
> .
>
> Though, without real-world working experience, it's hard to know if I'm
> right or not.
>
> So, I know there's some good legacy telco knowledge out on this list.
> What do you know?  Thanks!
>
> ___
> cisco-voip mailing list
> cisco-voip@puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
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Re: [cisco-voip] Anti-Tromboning Tie Lines to PBX

[Haas, Neal]

Back in the Day we had 11 Nortel PBX’s. I think that we had 11 PRI’s registered 
as MGCP. I don’t think we ever got the PRI’s to drop calls when a phone was 
transferred back to CUCM. Our next step was to look at SIP, but it just was not 
worth the cost to put a SIP trunk on the Nortel PBX to solve our issues (was 
like $30,000 or $40,000 to do so)

Best thing we do was purchase more CISCO phones :>

Thank You,

Neal Haas
NSE, Communications
Please report Troubles to the Help Desk. 559-600-5900
Telephone (559) 600-5890

From: cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] On Behalf Of 
Anthony Holloway
Sent: Tuesday, March 7, 2017 2:54 PM
To: Cisco VoIP Group <cisco-voip@puck.nether.net>
Subject: [cisco-voip] Anti-Tromboning Tie Lines to PBX

I'm not sure how often this gets configured out in the wild, but I do know that 
there are few different flavors of this feature, depending on your scenario.  
E.g., CUBE Media 
Anti-Tromboning<http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/media-path.html#concept_674530029296875008039300537109374>

The one I'm interested in would involve a tie line to a legacy PBX, and I'm not 
married to the IP technology: SIP, H323, MGCP, whichever will get the job done.

CUCM ---IP---> VGW ---T1/PRI---> PBX

The call scenario I'd like to see if we can avoid is when a call is established 
from CUCM to the other PBX, and then a phone on the far side transfers the call 
to an IP Phone on the CUCM side, I'd like the PRI usage to drop to 0 trunks in 
use, instead of nailing up 2 trunks for the duration of that call.

I'm looking for your experience and feedback in configuring anti-tromboning in 
this scenario.  One of the hardest parts in researching this, is knowing what 
terms to search for.  I think I've narrowed down the terminology to QSIG Path 
Replacement, as described in the CUCM 
SRND<http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/8_5_1/ccmsys/accm-851-cm/a08procl.html#wp1156114>.

Though, without real-world working experience, it's hard to know if I'm right 
or not.

So, I know there's some good legacy telco knowledge out on this list.  What do 
you know?  Thanks!
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[cisco-voip] Anti-Tromboning Tie Lines to PBX

[Anthony Holloway]

I'm not sure how often this gets configured out in the wild, but I do know
that there are few different flavors of this feature, depending on your
scenario.  E.g., CUBE Media Anti-Tromboning


The one I'm interested in would involve a tie line to a legacy PBX, and I'm
not married to the IP technology: SIP, H323, MGCP, whichever will get the
job done.

CUCM ---IP---> VGW ---T1/PRI---> PBX

The call scenario I'd like to see if we can avoid is when a call is
established from CUCM to the other PBX, and then a phone on the far side
transfers the call to an IP Phone on the CUCM side, I'd like the PRI usage
to drop to 0 trunks in use, instead of nailing up 2 trunks for the duration
of that call.

I'm looking for your experience and feedback in configuring anti-tromboning
in this scenario.  One of the hardest parts in researching this, is knowing
what terms to search for.  I think I've narrowed down the terminology to
QSIG Path Replacement, as described in the CUCM SRND

.

Though, without real-world working experience, it's hard to know if I'm
right or not.

So, I know there's some good legacy telco knowledge out on this list.  What
do you know?  Thanks!
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