Diagnosing Crackling Calls

[peterdonnelly]

Guys

Has anyone any thoughts on a procedure for diagnosing crackling calls. What can I run at the CS1000 that can tell me any information?

 

[bigindian65]

not enough info. is it sys wide? tdm and IP? in or out? both? to/from certain region (npa)?

Mato' Was'aka

 

[Firebird Scrambler]

If it only happens on outside calls, then you may want to disable some of your trunks.

All the best

Firebird Scrambler
Meridian Programmer in the UK

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

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

 

[hawks]

If it is over a a T1 then you may have clocking issues.

 

[NiteOwls]

First you need to understand that as long the call is digital eg ISDN link based etc, the cracling noises might come from either end-device, as the digital stream does contain 1 and 0 there is no way crackling sounds suddenly can appear in them.

Rule out that it is your end, by finding out who reports the crackling. Make agent sheets if it is a call centre and note down time and agent name that reports the issue. if there is not an obvious common occurance, note down remote party details. It might be that several people call/are called from the same number (especially in debt collecting) and speak to the same person with a bad phone causing the crackling.

Due to experience, when it is cause by the agent equipment it will be shown from the report sheet. When it is remote related, then agents will report equally.

~NiteOwls

 

[janaya]

Are you getting errors on the system? Look for err codes. We were managing hundreds of CS1000M Small systems and 9 times out of 10 the crackling sounds came from bad fiber between the cabinets.

Once replaced, no more crackling. Look at the cheapest solutions first.

What type of system is it? CS1000M Large/Small, CS1000E?

John

 

[peterdonnelly]

my system is a CS1000M. should I get my fibres between my ethernet switches checked?

 

[DocVic]

Go into LD 60 and enter LCNT. This list and error count of each T-1, PRI or what ever you have. If all counter are anything but Zeros, there is a problem. If you see slips or any errors, first do a loop back to your machine. If it runs clean for 10 minutes, it's not your problem. Call your carrier and tell them their circuit is having problems and to fix it.

DocVic
Dedicated to Nortel Products till the end.
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