Clock Controller Led States; Ntak93 D-Channel Handler Interface (Dchi) Daughterboard - Nortel Meridian 1 Option 11C Manual

Clock controller LED states

The clock controller LED, on the NTAK09 or NTRB21 faceplates, will be in
various states, depending on the status of the clock controller:
Table 2
Clock Controller LEDs
LED
On (Red)
On (Green)
Flashing
(Green)
Off

NTAK93 D-channel Handler Interface (DCHI) daughterboard

The NTAK93 DCHI daughterboard interfaces with the Option 11C Central
Processing Unit (CPU) and mounts on the NTAK09 DTI/PRI circuit card for
PRI or ISL shared mode applications. The DCHI is responsible for
performing the Q.921 layer 2 protocol information. It transfers layer 3
signaling information between two adjacent network switches.
The NTAK93 DCH daughterboard, when installed on the NTAK09 circuit
card, is addressed in the same slot as the NTAK09. The NTAK93 can use SDI
I/O addresses 0 to 79 and port 1.
Note: I/O addresses 0, 1, 2, 8 and 9 are preconfigured on the Option 11C
and must not conflict with the I/O addresses on the NTAK93 card.
Clock controller
NTAK20 is equipped and disabled.
NTAK20 is equipped and is either locked to a
reference or is in free run mode.
NTAK20 is equipped and is attempting to lock (tracking
mode) to a reference. If the LED flashes continuously
over an extended period of time, check the CC STAT in
LD60. If the CC is tracking this may be an acceptable
state. Check for slips and related clock controller error
conditions. If none exist, then this state is acceptable,
and the flashing is identifying jitter on the reference.
NTAK20 is not equipped.
PRI Implementation
Option 11C
Page 17 of 100
1.5 Mb DTI/PRI