Hi, Has anyone used TBCT/ with their PRI ? Thanks ____________________________________________________________ Receive Notifications of Incoming Messages Easily monitor multiple email accounts & access them with a click. Visit http://www.inbox.com/notifier and check it out!
Wow! Until you mentioned it I had never even heard of it. I'll ask my carrier if they even support it. -MC
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Jimmy Godbout Sent: Tuesday, April 08, 2008 12:35 PM To: freeswitch-users@lists.freeswitch.org Subject: [Freeswitch-users] TBCT
Hi,
Has anyone used TBCT/ with their PRI ?
Thanks
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It is not yet supported. I have some interest in sponsoring adding this functionality. Is anyone else interested in chipping in towards it? Mike On Apr 8, 2008, at 3:34 PM, Jimmy Godbout wrote:
Hi,
Has anyone used TBCT/ with their PRI ?
Thanks
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Can you give me a readers digest version of how TBCT works? It might be something that our company will use in the future... Thanks, MC
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Michael Jerris Sent: Tuesday, April 08, 2008 1:48 PM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] TBCT
It is not yet supported. I have some interest in sponsoring adding this functionality. Is anyone else interested in chipping in towards it?
Mike
On Apr 8, 2008, at 3:34 PM, Jimmy Godbout wrote:
Hi,
Has anyone used TBCT/ with their PRI ?
Thanks
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Michael Collins wrote:
Can you give me a readers digest version of how TBCT works? It might be something that our company will use in the future...
Thanks, MC
Blatantly stealing out of an old explanation found on the net:
Network Facility Request - Two B Channel Transfer (TBCT) (Synchronous Mode) TBCT enables an ISDN PRI user to request the switch to connect together two independent calls on the user's interface. The two calls can be served by the same PRI trunk or by different PRI trunks. If the switch accepts the request, the user is released from the calls and the two calls are connected directly. Billing for the two original calls continues in the same manner as if the transfer had not occurred. As an option, TBCT also allows for transfer notification to the transferred users.
TBCT works only when all of the following conditions are met:
The user subscribes to TBCT (this feature is supported for the 5ESS and 4ESS protocols only).
The two calls are of compatible bearer capabilities.
At least one of the two calls is answered. If the other call is outgoing from the user, it may be either answered or alerting; if the other call is incoming to the user, it must be answered.
In other words, you can transfer calls or otherwise connect 2 off-net stations without having to tie up two B channels and bridge them together yourself. --Jon Radel
Your blatant plagiarism answered my question perfectly. Another way of saying this, for those of us who are familiar with Centrex, is that this allows one to mimic the old "Centrex-transfer" where you flash and dial another number and the call gets transferred (or conference'd)... Makes sense and I think this is a valuable feature to have. I will see about lending technical and/or financial support. Thanks, MC
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Jon Radel Sent: Tuesday, April 08, 2008 3:25 PM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] TBCT
Michael Collins wrote:
Can you give me a readers digest version of how TBCT works? It might be something that our company will use in the future...
Thanks, MC
Blatantly stealing out of an old explanation found on the net:
Network Facility Request - Two B Channel Transfer (TBCT) (Synchronous Mode) TBCT enables an ISDN PRI user to request the switch to connect together two independent calls on the user's interface. The two calls can be served by the same PRI trunk or by different PRI trunks. If the switch accepts the request, the user is released from the calls and the two calls are connected directly. Billing for the two original calls continues in the same manner as if the transfer had not occurred. As an option, TBCT also allows for transfer notification to the transferred users.
TBCT works only when all of the following conditions are met:
The user subscribes to TBCT (this feature is supported for the 5ESS and 4ESS protocols only).
The two calls are of compatible bearer capabilities.
At least one of the two calls is answered. If the other call is outgoing from the user, it may be either answered or alerting; if the other call is incoming to the user, it must be answered.
In other words, you can transfer calls or otherwise connect 2 off-net stations without having to tie up two B channels and bridge them together yourself.
--Jon Radel
Something to be aware of is that after the transfer, even though the physical B-channels from the PRI link are not being used, they are still counted towards your total B-channel capacity (this is the case with my provider anyway). For example, if you have 12 B-channels from your provider, after 6 transfers no B-channels will be available until one of the previously transferred calls clears.
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Michael Collins Sent: Tuesday, April 08, 2008 3:43 PM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] TBCT
Your blatant plagiarism answered my question perfectly. Another way of saying this, for those of us who are familiar with Centrex, is that this allows one to mimic the old "Centrex-transfer" where you flash and dial another number and the call gets transferred (or conference'd)...
Makes sense and I think this is a valuable feature to have. I will see about lending technical and/or financial support.
Thanks, MC
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Jon Radel Sent: Tuesday, April 08, 2008 3:25 PM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] TBCT
Michael Collins wrote:
Can you give me a readers digest version of how TBCT works? It might be something that our company will use in the future...
Thanks, MC
Blatantly stealing out of an old explanation found on the net:
Network Facility Request - Two B Channel Transfer (TBCT) (Synchronous Mode) TBCT enables an ISDN PRI user to request the switch to connect together two independent calls on the user's interface. The two calls can be served by the same PRI trunk or by different PRI trunks. If the switch accepts the request, the user is released from the calls and the two calls are connected directly. Billing for the two original calls continues in the same manner as if the transfer had not occurred. As an option, TBCT also allows for transfer notification to the transferred users.
TBCT works only when all of the following conditions are met:
The user subscribes to TBCT (this feature is supported for the 5ESS and 4ESS protocols only).
The two calls are of compatible bearer capabilities.
At least one of the two calls is answered. If the other call is outgoing from the user, it may be either answered or alerting; if the other call is incoming to the user, it must be answered.
In other words, you can transfer calls or otherwise connect 2 off-net stations without having to tie up two B channels and bridge them together yourself.
--Jon Radel
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That kinda defeats the purpose of a TBCT doesn't it? :) /b On Apr 8, 2008, at 7:23 PM, Ron McLeod wrote:
Something to be aware of is that after the transfer, even though the physical B-channels from the PRI link are not being used, they are still counted towards your total B-channel capacity (this is the case with my provider anyway).
For example, if you have 12 B-channels from your provider, after 6 transfers no B-channels will be available until one of the previously transferred calls clears.
Brian West sip:brian@freeswitch.org
I think this is the case with that carrier perhaps, I can't see any mention of that sort of behavior in any specs describing how to do it. Mike On Apr 9, 2008, at 6:31 AM, Brian West wrote:
That kinda defeats the purpose of a TBCT doesn't it? :)
/b
On Apr 8, 2008, at 7:23 PM, Ron McLeod wrote:
Something to be aware of is that after the transfer, even though the physical B-channels from the PRI link are not being used, they are still counted towards your total B-channel capacity (this is the case with my provider anyway).
For example, if you have 12 B-channels from your provider, after 6 transfers no B-channels will be available until one of the previously transferred calls clears.
Brian West sip:brian@freeswitch.org
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Yes, I suspected it was Carrier inflicted pain. ;) /b On Apr 9, 2008, at 10:06 AM, Michael Jerris wrote:
I think this is the case with that carrier perhaps, I can't see any mention of that sort of behavior in any specs describing how to do it.
Mike
Brian West sip:brian@freeswitch.org
You're right -- this is a commercial issue, not a technical issue -- and I would expect that other providers/carriers operate the same way (my circuits are with Bell Canada).
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Michael Jerris Sent: Wednesday, April 09, 2008 8:07 AM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] TBCT
I think this is the case with that carrier perhaps, I can't see any mention of that sort of behavior in any specs describing how to do it.
Mike
On Apr 9, 2008, at 6:31 AM, Brian West wrote:
That kinda defeats the purpose of a TBCT doesn't it? :)
/b
On Apr 8, 2008, at 7:23 PM, Ron McLeod wrote:
Something to be aware of is that after the transfer, even though the physical B-channels from the PRI link are not being used, they are still counted towards your total B-channel capacity (this is the case with my provider anyway).
For example, if you have 12 B-channels from your provider, after 6 transfers no B-channels will be available until one of the previously transferred calls clears.
Brian West sip:brian@freeswitch.org
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You're right -- this is a commercial issue, not a technical issue -- and I would expect that other providers/carriers operate the same way (my circuits are with Bell Canada).
Bell Canada?!? That explains *all* of your pain! :P Okay, thanks for the info. I'm still waiting to hear back from my carrier(s) on whether they support this feature. BTW, my carriers have DMS500 switches in the C.O.'s... to the best of your knowledge do the Nortel's support TBCT? Thanks! -MC
-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch- users-bounces@lists.freeswitch.org] On Behalf Of Michael Collins Sent: Wednesday, April 09, 2008 12:13 PM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] TBCT
You're right -- this is a commercial issue, not a technical issue -- and I would expect that other providers/carriers operate the same way (my circuits are with Bell Canada).
Bell Canada?!? That explains *all* of your pain! :P
Okay, thanks for the info. I'm still waiting to hear back from my carrier(s) on whether they support this feature. BTW, my carriers have DMS500 switches in the C.O.'s... to the best of your knowledge do the Nortel's support TBCT?
Thanks!
-MC
I think DMS100/250/500 can all support this capability -- for both ISUP and PRI interfaces. They refer to it as the RLT feature. I would be interested in hearing how the carriers you deal with charge for this service. Extract from DMS250 feature list: Release Link Trunk (RLT) enables you to optimize trunk facilities by releasing PRI circuits after call bridging or redirection occurs. Without the use of RLT, calls that are extended to an enhanced services platform and subsequently bridged to a third party would need to be maintained, tying up additional resources. PRI RLT allows bridging or redirection to take place at the DMS-250 system so that corresponding circuits to the enhanced services platform can be released. -- Ron
I think DMS100/250/500 can all support this capability -- for both ISUP and PRI interfaces. They refer to it as the RLT feature. I would be interested in hearing how the carriers you deal with charge for this service.
Will do.
Extract from DMS250 feature list:
Release Link Trunk (RLT) enables you to optimize trunk facilities by releasing PRI circuits after call bridging or redirection occurs.
Without
the use of RLT, calls that are extended to an enhanced services platform and subsequently bridged to a third party would need to be maintained, tying up additional resources. PRI RLT allows bridging or redirection to take place at the DMS-250 system so that corresponding circuits to the enhanced services platform can be released.
Thanks for the info! -MC
Woof! On Wed, 09 Apr 2008 15:12:33 -0400, Michael Collins <mcollins@fcnetwork.com> wrote:
to the best of your knowledge do the Nortel's support TBCT?
Yes, they do. But only on the National ISDN 2 flavor of PRI (as of 10 years ago, anyway!). There is also a settable "choke" limit on how many calls can be outstanding at a time. It can be more than the number of B channels you have. --Woof!
I believe by spec its 2* the number of physical channels, but don't quote me on that. Specifically thats for everything going on on those spans including suspended calls (which we don't currently support anyway) Mike On Apr 9, 2008, at 4:08 PM, Andy Spitzer wrote:
Woof!
On Wed, 09 Apr 2008 15:12:33 -0400, Michael Collins <mcollins@fcnetwork.com
wrote:
to the best of your knowledge do the Nortel's support TBCT?
Yes, they do. But only on the National ISDN 2 flavor of PRI (as of 10 years ago, anyway!). There is also a settable "choke" limit on how many calls can be outstanding at a time. It can be more than the number of B channels you have.
--Woof!
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participants (7)
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Andy Spitzer
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Brian West
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Jimmy Godbout
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Jon Radel
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Michael Collins
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Michael Jerris
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Ron McLeod