2-18
Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter2 Cards Specifications
2.2.2 Optical Service Channel Cards
•PROT: Connected to the other MS-ISC-100T ports
The TCC is connected to the MS LAN by its front panel port. The back panel Ethernet port is disabled
and cannot be used in the MS node.
2.2.2 Optical Service Channel Cards
The Optical Service Channel (OSC) is a bidirectional channel that connects all the nodes in a DWDM
ring that transports general-purpose information without affecting client traffic. In its primary
application, this channel carries data sub-channels for telemetry (supervisory) services for an optical
system, provides orderwire applications, and provides transparent links between each node of the
network for user-defined or proprietary functions.
The ONS 15454 has two OSC cards, the OSCM and the OSC-CSM.
Table2-6 shows the optical specifications for the OSCM card.
Table2-7 shows the optical specifications for the OSC-CSM card.
Table2-6 OSCM Card Optical Specifications
Parameter Condition Min Max Unit
OSC bandwidth at –0.5 dB OSCRX -> TX – OSCTX 1500 1520 nm
Insertion loss OSCRX -> TX – OSCTX — 1.4 dB
OSC band chromatic dispersion OSCRX -> TX – OSCTX –10 +10 ps/nm
Polarization Mode Dispersion (PMD) OSCRX -> TX – OSCTX — 0.1 ps
Polarization Dependent Loss (PDL) OSCRX -> TX – OSCTX 0-10dB 0.45 dB
Optical power setting accuracy — –0.5 +0.5 dB
Optical attenuation VOAosc power set
resolution (granularity) — — 0.1 dB
Optical power stability — –0.2 +0.2 dB
Optical power setting time — — 200 ms
VOAosc dynamic range — 30 — dB
VOAosc off state AVS state 39 — dB
Directivity — 40 — dB
Return loss — 40 — dB
Table2-7 OSC-CSM Card Optical Specifications
Parameter Condition Min Max Unit
OSC (–0.5 dB bandwidth) LINERX – OSCTX
OSCRX – LINETX
1500 1520 nm
Channels (–0,5 dB bandwidth) LINERX – COMTX
COMRX – LINETX
1529 1605 nm