Datasheet

4-27
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 4 Optical Cards
4.13 OC192 LR/STM64 LH 1550 Card
The OC192 LR/STM64 LH 1550 card provides one long-range SDH STM-64 port per card, compliant
with ITU-T G.707 and G.957, and Telcordia GR-253-CORE (except minimum and maximum transmit
power, and minimum receive power). Also, the port is compliant to ITU-T G.691 (prepublished unedited
version 10/2000) L-64.2, except for optical output power and receiver sensitivity.
Note The optical output power of the OC192 LR/STM64 LH 1550 (+4 dBm to +7 dBm) is 6 dB lower than in
L-64.2b of the 10/2000 prepublished unedited version of ITU-T G.691 (+10 dBm to +13 dBm). However,
the total attenuation range of the optical path, 22 to 16 dB, is maintained by the optical receiver
sensitivity range of the OC192 LR/STM64 LH 1550 (–7 dBm to –24 dBm). This sensitivity range
outperforms the specification in L-64.2b of the 10/2000 prepublished unedited version of ITU-T G.691
as the resulting link budget of the card is 26 dBm.
The port operates at 9.95328 Gbps over unamplified distances up to 80 km with different types of fiber
such as C-SMF or dispersion compensated fiber limited by loss and/or dispersion. The card supports
concatenated or nonconcatenated payloads on a VC-4 basis, as well as VC-4, VC-3, and VC-12
payloads.
Figure 4-12 shows the OC192 LR/STM64 LH 1550 faceplate and a block diagram of the card.
Figure 4-13 on page 4-29 shows an enlarged view of the faceplate warning.
Note You can differentiate this OC-192/STM-64 card (15454E-L64.2-1) from the OC-192/STM-64 card with
the product ID 15454-OC192LR1550 by looking at the faceplate. This card does not have a laser on/off
switch.
Note The optics thresholds for this card are not retained after it is reset. As a result, the optics thresholds must
be configured every time this card is reset, or any time the TCC/TCC2 card is reset. See DLP-D109 in
the Cisco ONS 15454 SDH Procedure Guide, R7.0 for instructions on setting the optics thresholds.
Warning The laser is on when the optical card is booted. The port does not have to be in service for the laser
to be on.