Nortel Networks OPTera Metro 3500 - Manual (Page 310)

3-82 Hardware feature descriptions
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Note: 1+1 line protection can be used only between OC-3 ports which
have the same port number and which are located on OC-3x4 optical
interface circuit packs installed in adjacent slots. OC-3 ports in the odd slot
act as the working line, and OC-3 ports in the even slot act as the protection
line.
Unidirectional path switched rings (UPSRs)
UPSRs operating at an OC-3 line rate - and employing OC-3x4 circuit packs -
require two OC-3x4 circuit packs in each shelf.
Section data communication channel (SDCC)
An OC-3 line carries a DCC channel that can be edited, provisioned, and
deprovisioned. Each OC-3x4 circuit pack carries four SDCC channels (one for
each OC-3 port).
Note 1: The maximum number of simultaneous SDCC-provisionable
ports on an OPTera Metro 3500 shelf is 34 (the shelf must be equipped with
eight unprotected OC-3x4 or OC-12x4 STS circuit packs in slots 3 through
10, and a protected pair of OC-48 or OC-192 circuit packs in slots 11 and
12).
Note 2: For Nortel Networks interworking and multi-vendor network
scenarios, DCC interoperability can be achieved with the appropriate
provisioning. See Optical Networks Data Communications Network
Planning Guide, NTR710AM.
Alarm LED definitions
The following table provides a list of LEDs of the OC-3x4 optical interface.
EC-1x3 circuit pack
(NTN436AA)
Release 12 supports a version of the EC-1x3 mapper specifically for the
OPTera Metro 3500 shelf.
The EC-1x3 circuit pack receives and transmits three EC-1 signals from
external equipment and provides accessibility to VT1.5s or STS-1s within the
network element. This circuit pack is fully bidirectional. The facility signal
attributes for an EC-1x3 circuit pack facility are provisionable.
LED Color Description
Status Red Circuit pack failure
Active Green In service and carrying traffic
LOS(1-4) Yellow Loss of signal on the port