atcomsystems.ca/forum Forums VOIP Phones & IP PBX Cisco Telephones and Systems cisco call manager question..

is there a way to set your T1 clocking source in a call manager. I am dealing with an issue where I am seeing timing errors and have proved it is a cpe issue, the trouble is clocking errors. The vendor/CG insist there is no way for him to confirm or set his clock to sync from my network. We run clean to a loop at his CSU, as soon as that loop is down...timing errors.

It is my understanding that is has to be set via the serial port as a command...at least if I am reading this properly.

If this is another T in a multi-T system then it could be taking clock from another carrier that uses a different clock (GPS vs Atomic). We ran into this issue with a few carriers at a call center that had 8 and the solution was to not mix/match the T's.

I know this doesn't answer your direct question but changing the master clock to your T could cause their others to go down. I do now know if the Crisco allows you to have individual clocking of the T1 ports or not.

I know jack squat about Crisco, but I do know you are the clock source so you can't have a timing problem, if you did so would thousands of others. Why these idiots can't figure that out is a mystery to me. Setting his clock source is not your problem, but I know you're trying to help him out. Dang CG's :bang: :bang:

Bill it amazes me every time, this one was extra special he is insisting he has no way to set his clocking source!! James it is just one PRI...and If I changed my clocking I would be rapidly escorted from the building..lol Stratum one clock controls well everything

Well if it's a single PRI and nothing else then I have no clue why it's got clocking issues.

And I have ran into difference in clocking between providers. One carrier took their timing sync from GPS satellites and another carrier took their timing from an atomic clock. What happened is a solar flair came along and threw the GPS clocks off enough to cause timing to slip. Took weeks to figure that out. Basically the two switch tech's were on a phone conference and one goes "It's almost like there is a clock slip". The other goes "Well we take our clock from GPS". The first one went silent for a few seconds then went "You do what?". Problem solved.

lol..James the problem is he is most likely using the equipments internal clock instead of clocking from the network. We run into this rather often, my problem this time is this guy has no clue what he is talking about.

Yep everything is timed off that giant clock in the sky. If they didn't nothing would work.

Looks to me like your customer is going to have to call Crisco. There has to be a way to set timing. Even if it were Crisco to Crisco one would have to be master and the other slave.

oh Bill he called cisco...they first told him there was no way...Thanks to the powers of Google I was able to prove that wrong...If anything Cisco has all there info on the website for the world to see. Anyway after finding the info on the website we advised him to call Cisco and ask for tier 2. Te more and more I work with call managers the less I like dealing with them. I am not anti Voip, but God do I hate dealing with Cisco support

The new tech support. A script pops up on my computer screen and if it's not in the script it doesn't exist. This is the vast majority of support not just cisco.

So were you able to find the clock option for them? I can tell you from experience no matter how much you help people on their CPE troubles, you're still the big bad phone guy.

Bill we pointed them in the right direction and have not heard back so I am hoping they figured it out