Specifications

1-5
Cisco ONS 15530 Planning Guide
OL-7708-01
Chapter 1 System Overview
System Components
Figure 1-4 shows the architecture of the transponder line card.
Figure 1-4 Transponder Line Card Architecture
A safety protocol, LSC (laser safety control), shuts the transmit laser down on the trunk side when a fiber
break or removed connector is detected. The transponder line cards are hot pluggable, permitting
in-service upgrades and replacement.
Client Side Interfaces
The client interfaces on the SM transponder line cards and MM transponder line cards are protocol
transparent and bit-rate transparent, and accept either single-mode or multimode client signals on the
1310-nm wavelength through SC connectors. The multimode transponder supports 62.5 µm MM,
50 µm MM, and 9 or 10 µm SM fiber; the single-mode transponder supports 50 µm MM fiber and
9or10µm SMfiber.
The transponder interfaces support encapsulation of client signals in either 3R (reshape, retime,
retransmit) enhanced mode, which allows some client protocol monitoring (such as code violations and
data errors) or regular 3R mode, where the transponder is transparent to the client data stream. In either
case, the content of the client data stream remains unmodified. Configurable failure and degrade
thresholds for monitored protocols are also supported.
Table 1-1 shows the common client signal protocol encapsulations supported on the SM transponder line
cards and MM transponders modules.
LRC
Performance
monitor
To SRC
Optical
transceiver
ITU laser
Client
equipment
OADM
-
O - E
O - E
79290