JustBill,

Sec. NCI’s are formatted like this…

NN-LL-n/XXX/xx

* NN= (The first two digits) are the number of wire at the demark. 02= 2-wire interface, 04=4-wire interface.
* LL= (The 2nd two alpha characters) will indicate Protocol. This gets into the nuts-n-bolts of describing the signal (digital, analog or DC-signaling) to be expected.

Here are some high-runner examples:
CS= digital cross system
DA= Analog at a data level (13 Db down)
DC= DC current and/or voltage
DS= Digital rated term… for anything above 64 Kb DDS
DU= Digital Unit (64 Kb DDS and below)
DX= DX signaling
E?= (EA, EB, or EC) E&M signaling
GO= ground start OPEN end
GS= Ground start CLOSED (station) end
IS= ISDN BRI
LO= Loops start OPEN end (switch)
LS= Loop start CLOSED end (station)
NO= No signaling at voice level (0-8 Db)
RV= Reverse battery (trunks)

* n= Impudence code:
Most used:
2= 600 ohm AC impedance
3= 900 ohm AC impedance
5= 135 ohm AC impedance
9= 100 ohm AC impedance


* XXX (between the slashes) are protocol options… The can be used to modify or further explain the protocol. With up two three alpha numeric characters it’d would be impossible for me to try to list many but here one example of how it would work
04DU5/56_/-- .The DU tells ya it’s a DS0 rate digital the “56” would further explain that the customer wants a 56 Kb circuit.

* xx= TLP (transmission level point) Used to specify (if needed) what Db level is expected at the demarc. 1st character towards the network 2nd character toward the station/customer.

If you have a specific code you’d like to know what it means, let me know I’d be happy to decode it for ya!

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Bryan
LEC Provisioning Engineer
Cars -n- Guitars Racin' (retired racer Oct.'07)