now controller E1 shows up , phone line also working,

but it suddenly gets down after 10 min, 30 min, or sometimes after 1 hour

and shows messege i.e controller e1 down (RAI detected)

Mar  1 05:30:39: %CONTROLLER-5-UPDOWN: Controller E1 4/0, changed state to down

(RAI detected)ll

Core-r-Mumbai#sh controllers e1 4/0

E1 4/0 is down.

  Applique type is Channelized E1 - balanced

  Description: *** VOICE PRI ***

Receiver has remote alarm.

  alarm-trigger is not set

  Version info Firmware: 20070320, FPGA: 20, spm_count = 0

  Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.

  CRC Threshold is 320. Reported from firmware  is 320.

  Data in current interval (41 seconds elapsed):

     1 Line Code Violations, 2 Path Code Violations

     1 Slip Secs, 0 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins

     2 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Core-r-Mumbai#

I think there is a *very* high probability that this is a service provider issue.  What are they doing about it or telling you?  Someone at your telco/service provider needs to monitor the circuit and they should easily see why they are sending you yellow alarm.

Sure, if you have a spare card, try replacing it.  It will most likely help prove that the issue is on SP side.

I would suggest spending your time pressuring your SP to tell you what is wrong, why are they sending you a yellow alarm and fix it or get a colleague to do that part for you.

Good luck.

Brandon

but here there is no concern with ISP, because see the topology ISP said that our 2 Mb MPLS link is working properlly.

and on other hand EPBX person said that my line is ok bacuse its worked atlist for 1 hr or 30 minuts, it means no clocking or line issue.

they said your router card not able to handle the pressure of E1 line thats why it controller gets down.

so they asking me to replace card.

Along with RAI detected error , i also receive following error during startup.

%DSPRM-5-UPDOWN: DSP 10 in slot 4, changed state to up

Ahh, sorry I didn't look at your topology before.  Now I see that *you* are the service provider

So the yellow alarm is coming from the PBX.

There is no such thing as "pressure" on an E1. This is not plumbing after all and the fact that it works for a while and then breaks does not prove that there is no trouble with the PBX.

If you already know that this same problem was solved by replacing a card, then that could be the solution again, right?  I guess you could also ask the PBX tech to reboot his system or replace his E1 card too.

The DSP messages do not look like errors and I doubt they have anything to do with your issue.

Brandon

Yeah those are normal DSP messages, and DSPs are not necessary for L1 on an E1 to come up, anyway.

The conclusive test is to configure a T1 loopback cable and plug it into the port.  If the port comes up, you know your hardware is good, and the issue is either a physical cabling issue upstream (bad cable to smart jack, or bad smart jack, perhaps?) or a misconfiguration on someone's side regarding linecoding/clocking/framing.