atcomsystems.ca/forum Forums TDM Business Telephone Systems Nortel Telephones & Systems Nite Bell-ISDN PRI

Nortel Norstar Plus 6.1 system.

Customer claims auxiliary bells rang in warehouse at night and on weekends. Bells stopped ringing after analog trunks were replaced w/ ISDN PRI (?) 2 years ago. I found the bells, traced IW to yanked out wire. So, now I go to hook up the bell wiring to the system.

The manual shows lug 25 of the system's 66 block as the bell contact. I found the paging connected to lugs 40 & 41 and music on hold connected to lug 42; Nothing was connected to lug 25, so it threw me off. In day mode, my butt set DID NOT ring on incoming calls while across lug 25.

Question 1) Is lug 25 the right nite bell contact?

Question 2) Is ringing current for the bell supplied by the Nortel or the trunk? If it's a PRI line, then obviously there's no ringing current from the trunk, so either the PBX will need to supply it OR there's a Viking product of some sort to interface between the PBX bell contact and the bell to supply ringing current. I wasn't sure if the contact was simply an open/close type contact or not. If it is, I'll need battery.

Thasnks for your thoughts on this.

Danny

1-The auxiliary ringer uses pin pins 44,19( pair 19. 2-It is just a control contact to operate an
auxiliary ringer.

Some bells can be activated via a contact closure like the Norstar is providing. If your bells require ring current you can either install an ATA on a digital station port and do the required programming in ringing services or install a ringing power supply and an external relay (You must use an external relay since the Norstar contacts are not rated for ring voltage).

Hey, thanks for the reply.

It's on the yellow-brown (pair 19)? That's weird.

So the contact just opens and closes? I'm wondering if it will react to an incoming call from a digital ISDN line? If the contact triggers, then I'll need some sort of ringing current. I saw Viking had a box that connected into their paging controller over loudspeaskers but haven't seen anything supplying ringing current.

Anyone have any ideas?

You set the contact closure for each line under line programming, under AUX RINGER. Viking model PS-48-RGA will give you ring voltage plus 48vDC to power the external relay. If you have not wired one of these before you are better off going the ATA route, the cost is about the same and it is a much easier install.

Danny: Welcome to the Boards.
Unless I missed it somewhere, I did not read whether you had a MICS or a CICS.
Although if it has a PRI it must be MICS.
MICS - pair 19 Yellow/Brown off the 2nd Station Calbe
CICS - pair 25 Violet/Slate off the station cable (Just FYI)

The ICS (either one) just has a contact closure.
The contact closes when the AUX ringer is told to ring. This can be via a phone or a phone line (you program it).

This closure is just a signal to your Nite Bell. It cannot supply Current to turn your nite bell on. It does not supply Ring current either.
Your nite bell has to be powered separately then this is just a signal usually closes a super lo current relay that will energize the higher voltage or current to ring your bell.