Adding secondary clock reference daughterboard to Opt 11C

HelpAtWork · Jul 9, 2012

Quick question for the Guru's so I don't get in over my head..

I have a CC daughterboard on a TMDI card in slot one, set at the primary clock reference. I have a second CC I want to add to the TMDI in slot 2.

Is it as simple as installing the daughterboard on the card, then setting the SREF to slot 2 in LD 73?

Am I correct in the assumption that adding a secondary clock will serv as a failover/backup to my primary clock.

The CC in slot one has been giving me problems that we were chasing forever (ERR057, BUG253, frozen phone sets, and frame slips). I replaced it on the weekend and immediately all the problems stopped... so I figured, why buy 1, when I can have 2 for twice the price..

Thanks in advance.

PS: Opt11C ver 4.5. with 9 TMDI/T1 links to CO.

Firebird Scrambler · Jul 9, 2012

That's about right although you will need to make sure the dip switch on the PRI card is set to CC and also you might have to force the clocking onto the new card.

All the best

Firebird Scrambler
Meridian 1 / Succession and BCM / Norstar Programmer in the UK

http://www.linkedin.com/in/davidbromley

If it's working, then leave it alone!.

PERRYPJ · Jul 9, 2012

That's about it!

OLD ROLMEN WORKING ON NORTELS AND AVAYA

hawks · Jul 9, 2012

I thought you could only have 1 CC per cabinet. If you wanted to add the other one it would need to go in the IP expansion as in the following.

CC0 1-9 Card number for Clock Controller 0 (Option 11C with
Survivable IP)

CC1 xx Card number for Clock Controller 1. Where xx is:
• 11-19 for Survivable IP expansion cabinet 1

HelpAtWork · Jul 9, 2012

Can someone confirm yay-or-nay if i can have two CC's in the same cabinet? I was under the impression that we could have a failover clock in the same cabinet on another TMDI. We dont have any TMDI's in any of the other cabinets (3 cabinet system, connected to SSC with fiber boards)

allenmac · Jul 9, 2012

The clock controller can derive it's timing signal from a second PRI or T1 in the same cabinet, so in the DDB when you define the PREF and SREF, you are telling a single clock controller with loops to use as the Primary and Secondary clock source.

I'm not sure what the actual rules are about the max number of CC daughterboards per cabinet is, although I have never used more than 1 per cabinet in the last 15 years.

Crowtalks · Jul 9, 2012

It is my understanding the secondary reference clock controller is inactive unless the system sees slippage or it can't clock off the primary reference, so you still are only using one clock controller in your cabinet, even though you have two residing in there.

Jim

"If I had known it would turn out like this, I would have became a locksmith" Albert Einstein

NCSS NCTS NCTE CS1000E
Mitel 3300 4.2 basic & advanced, 5000 4.0, NuPoint I&M 4.2

hawks · Jul 10, 2012

The Primary & Secondary setting is just telling the 1 CC what span to use for a clock source. I can have a T1 in slot 1 and a T1 in slot 2 with my CC on either card. Then set my PREF to the span that the CC is on and the SEC to the other T1. This way if the Primary T1 drops for any reason the CC would automatically start clocking from the other span via the backplane of the cabinet. The active and inactive clocks are on the larger systems with multiple CPU’s. So for the Option 11c it’s 1 CC per cab.

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Adding secondary clock reference daughterboard to Opt 11C

HelpAtWork

Technical User

Firebird Scrambler

Programmer

PERRYPJ

Technical User

hawks

IS-IT--Management

HelpAtWork

Technical User

allenmac

Technical User

Crowtalks

Technical User

hawks

IS-IT--Management

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