PBXtech.info - View Single Post - Two B-Channel Transfer (TBCT)

Anonym0us · November 17th, 2004, 12:48 PM

Thanks for the replies!

Actually, what I am trying to do is determine what protocols on a Definity G3si V6 (or later) support blind transfers. Essentially, I have an IVR connected to the PBX. The IVR uses a Intel Dialogic DM/V480A-2T1 card and the PBX uses a TN464F circuit pack. I would like to verify that blind transfers work if I configure the T1 connection to be either:

1. T1 CAS (robbed-bit)
2. ISDN PRI

Ideally, I would prefer option (2) since DNIS/ANI can be used too. Can this be done ... or do I need TBCT? If I need TBCT, can this be configured on the G3si ... or does the carrier have to provide this functionality?

Alternatively, we are currently trying to use option (1). However, in our IVR application, when we do a flash hook, the PBX doesn't 'see' it. The T1 for option (1) has been configured as:

- DS1 (robbed-bit, b8zs, d4)
- Tie trunk group (wink/immed) with 24 members
- Using Uniform Dialing Plan (UDP)

Would this type of setup be called a 'trunk-side' (vs. line-side)? I've seen other information that say the T1 needs to be configured as a 'line-side' T1 in order to accomplish what I need. In Avaya terminology, does that mean instead of using UDP and a tie trunk group with 24 members, I should be using DS1FD(s) instead?

Any help would be greatly appreciated.

November 17th, 2004, 12:48 PM	#4 (permalink)
Anonym0us Join Date: Nov 2004 Posts: 2	Re: Two B-Channel Transfer (TBCT) Thanks for the replies! Actually, what I am trying to do is determine what protocols on a Definity G3si V6 (or later) support blind transfers. Essentially, I have an IVR connected to the PBX. The IVR uses a Intel Dialogic DM/V480A-2T1 card and the PBX uses a TN464F circuit pack. I would like to verify that blind transfers work if I configure the T1 connection to be either: 1. T1 CAS (robbed-bit) 2. ISDN PRI Ideally, I would prefer option (2) since DNIS/ANI can be used too. Can this be done ... or do I need TBCT? If I need TBCT, can this be configured on the G3si ... or does the carrier have to provide this functionality? Alternatively, we are currently trying to use option (1). However, in our IVR application, when we do a flash hook, the PBX doesn't 'see' it. The T1 for option (1) has been configured as: - DS1 (robbed-bit, b8zs, d4) - Tie trunk group (wink/immed) with 24 members - Using Uniform Dialing Plan (UDP) Would this type of setup be called a 'trunk-side' (vs. line-side)? I've seen other information that say the T1 needs to be configured as a 'line-side' T1 in order to accomplish what I need. In Avaya terminology, does that mean instead of using UDP and a tie trunk group with 24 members, I should be using DS1FD(s) instead? Any help would be greatly appreciated.