Sbs

btrain2871 · January 14th, 2008, 09:59 AM

What are SBS trunks? What is their purpose and how are they setup?

pganoe · January 14th, 2008, 04:33 PM

Signal Bearer Separation (or Separation of Bearer and Signaling)

Essentialy it is a DCS trunk with the Signaling going over your data network and the voice goes over the PSTN. Allows you to have 4 digit dialing and centralized VM, without a massive wan infratructure.

The way it works is:
1. Side A call an extention on side B
2. Side A looks it up in UDP and then aar.
3. Side A signals side B that it has a call for extention X
4. Side B looks up the extention in its Public-Unknown table and sends the area code and prefix back to side A.
5. Side A prepends the areacode and prefix to the extention and places the call out it's PSTN trunks.
6. Extention X recieves the call from the PSTN and caller ID from the data network.

It's not too difficult to set up if you follow the instuctions in the Feature Description and Implementation manual.

btrain2871 · January 15th, 2008, 06:14 AM

What hardware is needed if any? Also, does it matter what kind of system is on the other end (side b)?

January 14th, 2008, 09:59 AM	#1 (permalink)
btrain2871 PBXtech PLATINUM 300+ posts Join Date: Mar 2006 Posts: 384	Sbs What are SBS trunks? What is their purpose and how are they setup?

January 14th, 2008, 04:33 PM	#2 (permalink)
pganoe Join Date: Nov 2004 Posts: 4	Re: Sbs Signal Bearer Separation (or Separation of Bearer and Signaling) Essentialy it is a DCS trunk with the Signaling going over your data network and the voice goes over the PSTN. Allows you to have 4 digit dialing and centralized VM, without a massive wan infratructure. The way it works is: 1. Side A call an extention on side B 2. Side A looks it up in UDP and then aar. 3. Side A signals side B that it has a call for extention X 4. Side B looks up the extention in its Public-Unknown table and sends the area code and prefix back to side A. 5. Side A prepends the areacode and prefix to the extention and places the call out it's PSTN trunks. 6. Extention X recieves the call from the PSTN and caller ID from the data network. It's not too difficult to set up if you follow the instuctions in the Feature Description and Implementation manual.

January 15th, 2008, 06:14 AM	#3 (permalink)
btrain2871 PBXtech PLATINUM 300+ posts Join Date: Mar 2006 Posts: 384	Re: Sbs What hardware is needed if any? Also, does it matter what kind of system is on the other end (side b)?

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