Loop Guarded / Loop Unguarded

[ccarmock]

I wonder if anyone can tell me the difference between LoopGuarded and LoopUnguarded in terms of the way a Norstar CICS PLUS use analogue lines?

I have a system that I need to allow DISA on and the only way I can get a line to allow configuration as an Auto Answer line is if it's defined as Loop Guarded.

I wonder if this has anything to do with the Central Office/Exchange doing a loop reversal or similar on the line to signify end of call?

This system is based in the UK. I don't know if BT can set a line up for disconnect supervison?

Regards
Clive

 

[oldward]

You need it guarded so the line drops when the outside caller hangs up first: the system needs to see the drop in loop current from the CO to drop the line otherwise it will stay busy.

 

[ccarmock]

AH ok - so the Central office exchange would also need to be setup to send that 'drop' signal too? UK BT lines don't do this as standard, but I am not sure if they can be setup by BT to do that.

 

[RikRodgers]

In the States, we call it Disconnect Supervision, but it sounds like the same thing. I'm sure the CO can set it up.