Interested to know PBX without D-channel

[Tsaf360644]

Hi Folks,

I heard that Previously Nortel Was having a pabx model, which was E1 or T1 but without D-Chennel.

can anyone give me some more information on this.

I just want to know about this as I like Nortel very much.

Regards

 

[dadz]

I'm not entirely clear on the exact nature of the question you're asking. But let me hazard a guess.

Are you referring to the configuration of a T1 circuit?

There are two setups:

1. PRI - Primary Rate Interface (uses a d-channel)
2. CAS - Channel Associated Signaling (uses inband signaling, no d-channel)

Before going off on the wrong path, please post more details.

 

[Tsaf360644]

hi,

i had discussions with my techie friends from avaya and audiocodes, they happend to tell me that there was one nortel system (pbx) which was not having the d-channel.

and as a curiousity i posted this on forum to get to know about this.

thanks

 

[Tsaf360644]

Hi,

Also would like to know which type of CAS (CAS name)is used here.

Regards

 

[bigindian65]

you can build a dti instead of pri for tie lines between pbx's depending on their usage? Is that what you are asking??

Mato' Was'aka

 

[Tsaf360644]

hi,

No, I heard that previously there was a technology in Nortel, where we used to have PRI or DTI (i am not sure) wihtout D-channel. I just want to know what type of CAS used here and if possible pabx model type.

Regards,

 

[Johnthephoneguy]

It's just a circuit. As far as I know there is no magic Nortel stuff involved. You can have it either way but thats not proprietary.

JohnThePhoneGuy

"If I can't fix it, it's not broke!

 

[SL1M1]

Maybe 'ISL' using 'Separated Dchannel' using DTI (inband) with external Nortel propretary signalling over say a MUX network for bandwidth efficiency ie 28k voice with minimal signalling...But that was used many moons ago !!

Cheers!!