atcomsystems.ca/forum Forums General General Telephone & Systems Information circuit ID's

I was reading posts on another forum about DSL. What is a TXNU? Is that a type of circuit?
Also does anyone have a list of circuit ID's such as for Hi-Cap or ISDN?
Thanks,
Jeff

Jeff those are called NCI codes, or common language codes. Might do a search and find them in google, also the station end is the secondary NCI codes.

Jeff:

From what I have seen around here, at least with Bell companies, the circuit ID format is as follows:

AABBBBCCCCCC.D.E(E)

AA= the last two digits of the LATA

BBBB= the circuit type i.e: IBZD is for a BRI, HCGS is for a T1, TKNA is a copper loop-start trunk, etc.

CCCCCCC= the actual circuit number

D= the identification of the circuit in multiple circuit applications, as in with multiple PRI's associated with the same telephone numbers.

E(E)= a one- or two-digit variable that is administered locally for various reasons.

For billing and tracking purposes, every circuit, even DSL riding on a voice line needs to have some kind of number associated with it so that it has a "name".

I have never actually gotten a definitive answer on this, so what I have said is just information gathered through experience in dealing with circuits. The circuit numbers assigned by CLECs or other carriers don't really seem to follow any standard format; it's the LEC's circuit that must follow a somewhat uniform standard under the CLI (Common Language Identifier) code.

We are in LATA 236, so here's an example of one of our BRI circuits here in our office:

36IBZD835980.1.CD

Ed's got the circuit ID. the 4 letters after the lata indicate what type of circuit. Here is a explanation of NCI codes from Qwest, it should be the same for all baby bells because of the bell standard.
https://www.qwest.com/techpub/77203/77203.pdf

I'm still looking for the circuit ID explanation.

Hey Jeff, put your circuit ID question in Telephone service, bet she can answer your question and save me a lot of searching.

Yikes, Bill! I think I could have read the entire Webster's dictonary in the time it would take to read that thing! No wonder we have to pay $8.50 per month for Caller ID.........It's to pay the people behind the scenes who are paid to write this stuff!

Hey Ed I used to know how to decipher all that junk, now I'd need the book.

Jeff:: here is more than you asked for, all the voice grade service ID's and what they mean. The first two letters get you to the voice grade type and the second two to the specific service.

https://www.qwest.com/techpub/77310/77310.pdf

According to what I could find, I am in LATA 320.
I have seen circuits for t1's that are 24DHZA, 90HCGS, etc. Just wondering what the difference would be, possibly different COs?

Jeff: There are long haul carrier ID's AT&T, MCI and so on. AT&T was DHEC (usually) for a T1, so I assume your DHZA is another long haul carrier. The HCGS is the LEC. You should know they couldn't use the same numbering system, you should have seen the mess we had before we were allowed to cross reference LEC ID's with ours. Of course you had different LEC ID's for each end, even if it was the same LEC.

PS to further confuse the issue the term LATA is used for calling area's but is not the same area as area codes..now figure that one out.

I looked up online for the Cleveland area and I found LATA 320. The area code is 216.
Thanks for the information.
Jeff
EDIT: looked up DHZA and found that it is SBC, along with HCGS. SBC is our telco here. (well now it's at&t)