PRI DCH's dropping - Counter Errors

[RickyPone]

Switch to the secondary clock. Could be your clock. Could be your pri card. I don't put much faith in telco either. Still could be them.

 

[msteeler]

Thanks, how do I change it to clock on 25?

should both SSCK 0 and 1 be set the same? Thanks

 

[trvlr1]

Per the manual, LD 60

TRCK aaa Set clock controller tracking to primary, secondary or free run.
Where aaa is:
• PCK = track primary clock
• SCLK = track secondary clock
• FRUN = free run mode
Track primary clock (PCK) or secondary clock (SCLK) as the
reference clock or go to free run (FRUN) mode.

Free run is not a good option unless both clocks are screwed up. I would get the Telco to check their circuits first.

 

[bhassell2000]

try TRAK SCLK in ld 60, shouls tell it to track off the secondary source

Thanks,

Buddy

Linked in Profile

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

 

[msteeler]

I finally have the account manager with AT&T working on this so I'll hold off on changing the clock.

Last time I opened a ticket with AT&T the tester wanted to argure with me that my circuits were not PRI's but a T1 High Cap circuit, no d-channel. I could only go around with him for so long before hanging up on him on and going about this a different way.

With the d-cjannel dropping it just seems like I would have some errors in LD 60 with LCNT but I never do.

I have a spare clock card, I suppose I could swap that out?

 

[RickyPone]

That dch message you posted does not indicate that the d-channel was out of service. If that is all that is happening don't worry about it.

 

[msteeler]

Here's the latest since I cleared the counters about 2 hours ago.

.lcnt

PRI TRK LOOP 24
TRSH CNT:
BPV -000
SLIPD -000
SLIPR -000
CRC -000
LOSFA -002
OS_BPV -000
OS_LOSFA-001
OS_YEL -000


PRI TRK LOOP 25
TRSH CNT:
BPV -000
SLIPD -000
SLIPR -000
CRC -000
LOSFA -000
OS_BPV -000
OS_LOSFA-000
OS_YEL -000

DCH: 24 MAINT CONFIRM TIME: 13:04:58
COUNTER VALUE
1 2
10 15
18 29

No errors on DCH 25

 

[RickyPone]

Do you ever see the d-channel release or the the b-channels go out of service? I would think so on loop 24. Go ahead and switch to the secondary clocking source. I would check the cable from the i/o panel to the csu.

 

[msteeler]

The circuits themselves never drop, it's just the d-channel's that release and then the channles go MBSY. 10 minutes later they re-establish and we are back up.

I checked this morning and my active clock is ssck 1... not ssck 0. When my switch goes between CPU 0 and 1 during midnight routines does it also switch clocks? Thanks

Also, would it be a issue it AT&T is looking for B and D- channel signaling and I don't have that turned on?

 

[RickyPone]

Those errors don't really point to a clocking trouble. I would think it is circuit related. That's why I said to check the cables. Wiggle them at the ends and try to make the circuit drop. Then I would replace my pri card just to eliminate that. What kind of card is the d-channel on?

 

[msteeler]

The d-channel card is daughterboard that is on the Dual PRI card.

D-channel Card - NTBK51AA
Dual PRI Card - NT5D12AG-02

I do have a spare PRI Card (NT5D12AC-01) that my old T1 was on before we cutover to the two PRI's.

Cabling is all good. I just ran new cables from the NIU to the CSU. Pinout from the DB-15 should be good.. it was running fine for two months and if it wasn't I would think I would get a lot of errors.... no? Here's the pinout I've been using

RJ45 DB15
1(blue) to 11
2(orange0 to 3
4(red) to 9
5(green) to 1

As for the CSU's - one is a T-Serv 2 and the other is a Adtran CSU ACE.

I suppose there are a lot of points of failure here from the carrier all the way to the PRI card.

 

[RickyPone]

You may not get a lot of errors. The way to verify cabling is to roll the cables. If the trouble stays on 24 then you know it is the pri card, daughterboard, or telco circuit. Doubt it is the daughterboard, probably telco. Yes there are multiple trouble spots in the telco circuits.