When Private Line Automatic Ringdown Circuits (PLAR) are delivered via channels on a T1, must they first be broken out into individual analog circuits by a Channel Bank before being connected to a Communication Manager controlled system, or can the T1 be terminated directly onto a DS1 card with the ringdowns on the channels still being handled correctly by the PBX?
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Private Line Automatic Ringdown Circuits
- Thread starter libellis
- Start date
Last I worked on PLAR circuits I received them on a DS1 and then defined the DS0's to sets as Personal CO Lines. Once the PCO's were defined I bridged them to other sets.
This was a while ago I have no samples to share Sorry
Hope this helps
ED
1a2 to ip I seen it all
This was a while ago I have no samples to share Sorry
Hope this helps
ED
1a2 to ip I seen it all
- Thread starter
- #3
Thanks. Seems like this should work, since all that is required is that the CO see a line (in this case on one of the T1 channels) go off hook. The CO should then automatically ring the far end. The Avaya can handle the T1 channels directly when they're programmed to look like analog trunks and dialtone is expected, so why not when they are PLAR.
The T1 must be configured for "CAS", this is the only way an AVAYA PBX can support ARDs delivered via a T1. We have done this in the UK, where they are available. I have not seen any every delivered this way in the U.S., we always use a channel bank and interface them via CO trunks in the US, because of lack of CAS supported T1's.
If you order your circuit through IPC's circuit group, that would be one of the only possibilitys of getting a CAS T1 circuit in the US
mitch
AVAYA Certified Specialist
If you order your circuit through IPC's circuit group, that would be one of the only possibilitys of getting a CAS T1 circuit in the US
mitch
AVAYA Certified Specialist
1a22ip, to support ARDs, delivered via a T1, the signalling on the T1 must be set to "CAS", otherwise it won't work. We've tried, and this is the only way to get it working. This is on a UK switch...
display ds1 002v4
DS1 CIRCUIT PACK
Location: 002V4 Name: LONLON096242
Bit Rate: 2.048 Line Coding: hdb3
Signaling Mode: CAS
Interconnect: pbx Country Protocol: 10
Interface Companding: alaw CRC? n
Idle Code: 01010100
Slip Detection? y Near-end CSU Type: other
Echo Cancellation? n
Command:
Then you add the trunks as TIE trunks, group type TIE, and put the channel as the ringdown, such as 002V401. We then send these to X ported stations and bridge them on phones, this way we can control if the ringdown actually rings on the phones, some traders only want to "see" them, no hear them...
mitch
AVAYA Certified Specialist
display ds1 002v4
DS1 CIRCUIT PACK
Location: 002V4 Name: LONLON096242
Bit Rate: 2.048 Line Coding: hdb3
Signaling Mode: CAS
Interconnect: pbx Country Protocol: 10
Interface Companding: alaw CRC? n
Idle Code: 01010100
Slip Detection? y Near-end CSU Type: other
Echo Cancellation? n
Command:
Then you add the trunks as TIE trunks, group type TIE, and put the channel as the ringdown, such as 002V401. We then send these to X ported stations and bridge them on phones, this way we can control if the ringdown actually rings on the phones, some traders only want to "see" them, no hear them...
mitch
AVAYA Certified Specialist
- Thread starter
- #7
Thought standard voice T1's use CAS signaling while CCS is normally associated with an ISDN PRI, so I'm a bit confused about not being able to get a CAS T1 here.
Some months back we connected an IPC (WestCom) T1 to a Mitel 3300ICP with no problem. It had a full 24-channels, with no channel reserved for signaling as it would have been if it were CCS rather than CAS.
Some months back we connected an IPC (WestCom) T1 to a Mitel 3300ICP with no problem. It had a full 24-channels, with no channel reserved for signaling as it would have been if it were CCS rather than CAS.
Yes libellis, pretty much the only company that can deliver a CAS T1 is IPC (Westcom). There is no signalling channel used, this is NOT a PRI, it is a T1 T1, with CAS signalling. That T1 that you received from Westcom was a CAS T1, I would bet you.
mitch
AVAYA Certified Specialist
mitch
AVAYA Certified Specialist
- Thread starter
- #9
Thanks Mitch672. Any T1 for this application would likely come from IPC or someone else (is there anybody left after IPC has purchased most of its competitors) able to deliver with the correct signaling format.
The good news is that it can be done on the Avaya.
The good news is that it can be done on the Avaya.
The T1 in NY (USA) was set to Robbed Bit. When I had PLAR this was the setting. But I had no Siginalling on the circuit. It was call a Hoot & Holler line (up and active to speakers). Mitch is right that this will only work on a NON PRI T1 span. I never seen PLAR or ARD on PRI. It like mixing Apples and Oranges.
Again this was ages ago.
Hoots and ring downs and B*TCH Boxes OH My
ED
1a2 to ip I seen it all
Again this was ages ago.
Hoots and ring downs and B*TCH Boxes OH My
ED
1a2 to ip I seen it all
- Thread starter
- #11
I appreciated both your inputs 1a22ip and Mitch672.
I was aware that CAS is the signaling required for the PLAR T1 and that PLAR's are not delivered over a PRI, but I think I partially misinterpreted Mitch672's initial reply, and my subsequent response reinforced that impression. Anyway, "all's well that ends well". Thanks again.
I was aware that CAS is the signaling required for the PLAR T1 and that PLAR's are not delivered over a PRI, but I think I partially misinterpreted Mitch672's initial reply, and my subsequent response reinforced that impression. Anyway, "all's well that ends well". Thanks again.
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