E1 Alarm in Cisco 1841

Answered Question
Jul 30th, 2006
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Hi All,

I have a WAN link of 2 Mbps, on one side of WAN, service provider is providing us the E1 Rj48 Say End "A".

And on other side, provider is giving us E1 BNC connector , Say End "B".

On Side A i used E1( G.703) to V.35 connector, as i have V.35 interface at location A router( cisco 2611) and on B side i used the BNC to Rj48 connector( balun)

( i have E1 Rj48 interface card at Location B.

On side A i have cisco 2611XM router and on side B i have Cisco 1841 router with E1 interface.

When i connect the lines to both sides Alarm was coming on the E1 interface of Location B .

Our provider is saying there is no problem in the Line and when Provider take loop from end to end Alarm light goes off.

Could any one suggest me if some thing is wrong in the configuration.

I would appreciate any suggestion for solving my trouble.


Correct Answer by jackyoung about 11 years 2 weeks ago

Could you advise what alarm it shown. You may check below link for the solution. Please advise more details if it still not able to solve your question.


Hope this helps.

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Overall Rating: 5 (1 ratings)
bhatti.imran Mon, 07/31/2006 - 02:09
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Dear jack ,

Thanks for your usefull link .

I just changed the configuration of E1 Controller.

controller E1 0/0/0

channel-group 0 unframed

And after this controller E1 is Up now but Serial is still down.

below is the out put of sh controller E1.

E1 0/0/0 is up.

Applique type is Channelized E1 - balanced

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20050620, FPGA: 16, spm_count = 0

Framing is UNFRAMED, Line Code is HDB3, Clock Source is Line.

CRC Threshold is 320. Reported from firmware is 320.

Data in current interval (482 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

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

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 198 Unavail Secs

Total Data (last 85 15 minute intervals):

219230 Line Code Violations, 2830 Path Code Violations,

0 Slip Secs, 5 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,

0 Errored Secs, 0 Bursty Err Secs, 5 Severely Err Secs, 76300 Unavail Secs

I am confused is this line trouble or any configuration trouble.

looking for your help.


jackyoung Mon, 07/31/2006 - 03:20
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It is good that the E1 is up. You can follow the link that have some exmaples.


However, please ensure the FRAMING, LINE CODE & CODE SOURCE is correct. You can those information from the PTT.

After to configure the conrtoller, you have to config. the serial.

Hope this helps.

bhatti.imran Mon, 07/31/2006 - 16:44
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Thanks Jack,

My problem has been resolved,

After changing the channel-group unframed , encapsulation of Serial interface was changed to HDLC so i changed back to PPP and all the things goes well. Thank you very much for your kind support and help.

jackyoung Mon, 07/31/2006 - 17:27
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You are welcome. It is great that you solved the problem. ;)


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