Crc-6 Help

[jewillis]

My carrier suggested I enable CRC-6 on my Dialogic JCT480-2T1. I know this is a Dailogic setting, BUT I can not find anything on the dialogic site about this or how to set it (except for http://www.dialogic.com/support/helpweb/dx...2000/tn059.htm) and I have no idea what config file they are talking about.

 

Can anybody help on this issue

 

Jeff

 

[SupportTeam]

What protocol is used on this T1?

 

Please post full protocol specs as supplied by the carrier/Telco.

[jewillis]

ISDN - DMS (National ISDN-2 (NI-2). )

 

http://www.qwest.com/wholesale/pcat/isdnpri.html

 

 

 

[SupportTeam]

The 4ess.prm config file that the http://www.dialogic.com/support/helpweb/dx.../2000/tn059.htm note is talking about is in Dialogic's \data\ subdirectory.

 

Looks like the relevant instructions are:

 

Add the following parameter to the .prm file being used (i.e. 4ess.prm)

 

;--- CRC ENABLE SWITCH

;--- Turns the transmission of the CRC-6 pattern on or off and searches

;--- for such a pattern in the received signal.

;--- Possible values for the data are as follows:

;--- 00H = Turn CRC off.

;--- 01H = Turn CRC on.

000F 01

 

Restart Dialogic services for the change to take effect.

 

Note that this may correct some of the ESF framing errors, but if you are getting ESF errors then you should probably look at the quality of your T1 connection on the physical/electrical level. CRC does not fix all errors.

 

If you have multiple T1 connections in the same computer then there may be some clocking issues here which result in time-slips and hence the framing errors which I guess you are seeing.

[Guest blk182n7]

you set it in the .PRM file for the protocol you are using. 000F :

 

 

;--- CRC ENABLE SWITCH (Parameter type 000F)

;--- Turns the transmission of the CRC-6 pattern on or off and searches

;--- for such a pattern in the received signal.

;--- Possible values for the data are as follows:

;--- 00H = Turn CRC off.

;--- 01H = Turn CRC on.

000F 01