atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services T1's, CSU's and DSU's Circuit Codes on Demark

Bryan, if that's not the complete list, I don't think I want to know the rest. My head's already about to explode from just that list. Thanks for the excellent information.

My goodness, Bryan! :bow:
I dont think the code list will ever be complete!

One day, I'll break down and buy me a copy of ANSI Document T1.238-2003 - Structure for the Identification Codes of Telecommunications Facilities for the North American Telecommunications System.

Thanks for providing that ID structuring format also!
And the Professor on the drumkit said..."The beat goes on!"

So are those only the first 2 letters of the codes?
so HCGS is Access Digital High Capacity, 1.544 Mbps (DS1)...a T1, I am going only off the HC part.
GS is something totally different...

Yeah first 2 Jeff.

Jeff,
41/HCGS/xxxxxx//SW
The first two letters, in your example "HC" indicates 1.54 Mbps access circuit. A Hi-Cap T1...

The "G" and the "S" operate independently to modify the service code “HC.” Again using your "HC & "GS" example (which is a good one) GS= Interstate: The interstate usage is more than 10% interstate as determined by the "PIU" FID, or for Feature Group A services, the "UTNT" FID initially indicated more than 10% interstate usage. Customer/provider interface.

Get that????
Here's a lil' more help:
FID=Field identifier (these work with USOC's which are Universal Service Codes that are placed on the orders.)
PIU=Percent interstate usage

Keep in mind that some codes are applied industry wide, while some may be specific to a particular provider. Example: The codes that I mentioned in my earlier post are standard for Qwest, but may also apply to other providers.

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