![](/images/backgrounds/146446/146446-244225x1.png)
Glossary
(ANSI) Standard T1.618 and the International Telegraph and Telephone Consultative Committee (CCITT) Standard Q.922, indicates the functions associated with certain DLCI values:
DLCI | Function |
Values |
|
|
|
0 | |
|
|
Reserved | |
|
|
Assigned using | |
|
|
Layer 2 management of | |
|
|
Reserved | |
|
|
1023 | |
|
|
DCD (Data Carrier Detect) See CD (Carrier Detect).
DCE (Data Communications Equipment, Data
D channel Standard channel on an ISDN PRI or BRI line. At 16 Kbps, a D channel carries all signalling information and can carry low- speed packet data such as X.25 packet switching.
DE See discard eligibility.
Demarc (demarcation point) The point on a customer's premises where the line from the telephone company meets the customer's wiring at the customer's premises.
DFT See Distributed Function Terminal.
Directory Number Your
Discard eligibility (DE) A bit indicating that a frame may be discarded in preference to other frames if congestion occurs to maintain the committed information rate. See also excess burst size (Be) and CIR.
5536 PRI RAS Communications Controller Users Guide | 205 |