Nortel Networks OPTera Metro 3500 - Manual (Page 315)

Hardware feature descriptions 3-87
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
You can provision a maximum of 84 protected DS1 facilities for each shelf.
Alarm LED definitions
The following table provides a list of the DS1 mapper LEDs. See Figure 3-28
on page 3-47 for the DS1 mapper faceplate layout showing the location of the
LEDs.
DS3x3 mapper
(NTN437AA)
The DS3x3 mapper has three DS3 ports and provides add/drop capability for
three DS3 signals. Each port functions independently and in the same way as
a DS3 mapper.
Note: Neither the DS3x3 mapper nor DS3 services are VT managed.
Equipping rules
Connectivity for the three DS3 signals at each slot is through the BNC 12-Port
Front I/O module (NTN452JA) on the OPTera Metro 3500 Shelf
(NTN476DA). On the OPTera Metro 3500 Universal Shelf (NTN476AH) you
must use the BNC 12-Port Front Enhanced I/O module (NTN452JH) or the
BNC 12-Port Rear I/O module (NTN452KA).
Table 3-11
DS1 I/O module types
DS1
ports OPTera Metro 3500 Shelf
Assembly (NTN476AA, DA) OPTera Metro 3500 Universal Shelf Assembly (NTN476AH)
Front access only Front access Rear access
I/O name I/O PEC I/O name I/O PEC I/O name I/O PEC
1-28 DS1 1-28 Front
I/O module NTN452AA DS1 1-28 Front
Enhanced I/O
module
NTN452AH DS1 1-28 Rear
I/O module
NTN452BA
29-56 DS1 29-56 Front
I/O module
NTN452CA DS1 29-56 Front
Enhanced I/O
module
NTN452CH DS1 29-56 Rear
I/O module
NTN452DA
29-84 DS1 29-84 Front
I/O module
NTN452EA DS1 29-84 Front
Enhanced I/O
module
NTN452EH DS1 29-84 Rear
I/O module
NTN452FA
LED Color Description
Status Red Circuit pack failure
Active Green DS1 equipment is active and at least one DS1 line
facility is in service with at least one cross-connect