Where do I wire MOH on a UK Compact Plus/CICS 2

[KarlWhite]

As the subject line suggests, we have a Norstar Compact Plus (effectively a CICS). I am looking into adding Music On Hold, however all the pinouts and wiring diagrams I can find (both in the very useful FAQs, and also in all the manuals I have found) seem to refer directly to the amphenols.

The problem we have is (presumably due to BT 'customisation'), the amps are not exposed, and there is a PCB connected onto them. Therefore the colour-pairing codes for the MOH connection doesn't really help.

Is anyone experienced with this? Can anyone offer any advice/direction?

Many thanks in advance,
Karl

 

[KarlWhite]

...first to answer gets a free smiley!

 

[oldpolelineman]

Turn background music on on a phone you can hear from the KSU,use a tone generator andtouch the leads to the contacts you have accest to fron the cable that has the trunks(dial tone) going intothe KSU(in the US KSU would be the 23 pair) you should hear the trace tone when you touch the right connection.
Is a PCB= printed circuit board? patch panel?


Ken

 

[KarlWhite]

Thanks for the reply Ken. Smiley as promised:

It is a PCB effectively screwed onto the front of the CCU, covering the right-hand side (i.e. over the two amps and serial port). It is an official Nortel appliance, and is sporting a Nortel badge and serial, but it appears they have only supplied it in the UK.

On this board there are a number of mounted punch-blocks, some labelled (e.g. PAGE, EXT.PAGE, IATA), but most not. Many of them are easily identified by tracing them either to the incoming lines and the distribution panel (in a separate box) - and to be fair, most of these have the appropriate port number printed next to them, however there are many unused/empty unlabelled blocks. Once of these will presumably hold the elusive MOH pair.

(What I wouldn't give to see an RJ21 plugged into that amp right now...)

It may surprise you to know I'm not an engineer so I'd like to know a little more about this setup before I dive in feet first, and tek-tips has always been very useful at getting answers.

If anyone is familiar with this setup, or can offer further advise I'd be very grateful!

Karl

 

[Deweyhumbolt]

oldpole gave you the advice you need. Turn on Background Music, Ftr86, on a telephone you can hear. Plug your tone generator in your unmarked holes, or use the leads, and you'll be woken up when you hit the MOH pair.

Adversity is Opportunity

 

[KarlWhite]

...and very good advice it is too!

As I won't be able to look at this until tomorrow, I just thought I'd keep the post open overnight in case someone spotted it that knew the specific pair (just hoping to save myself a few minutes of guesswork).

My apologies to oldpole if it sounded like I was dismissing his advice out of hand, as that most certainly isn't the case. It is sound advice and is very much appreciated!!!

Karl

 

[edderos]

Looks like you have an Interconnection Termination Unit (ICTU) - # NTA802PA.
If so look for the two IDC connectors labelled K10 and K11 that are mounted just below the Analog Ident Block (your BT line is connected to this block). The pair you need is on K11, that's the IDC connector nearest the Analog Ident Block, and is marked MSCX.
This is a two wire circuit and is best connected via an isolating transformer from your music device. Use Ftr 86 as previously mentioned.

Hope this helps,
Ed

 

[RikRodgers]

Sometimes trying to make things user friendly for the customer just ends up complicating them for the tech. 66 blocks are highly underrated.

 

[KarlWhite]

Agreed... and yet if they were trying to make it user-friendly for the user, they've failed dismally there too!