Cisco SCE8000 GBE - The Optical Bypass Module

6-4
Cisco SCE8000 GBE Installation and Configuration Guide
OL-19897-02
Chapter 6 Cabling the GBE Line Ports and Completing the Installation
The Optical Bypass Module
Cisco SCE8000 GBE #0
• Traffic ports are connected as usual (see Ta ble 6-1)
• Port 3/2/0 (1-port 10GBE SPA): Cascade, connect to Port 3/2/0 in Cisco SCE8000 GBE #1
• Port 3/3/0 (1-port 10GBE SPA): Cascade, connect to Port 3/3/0 in Cisco SCE8000 GBE #1 (only if
there are two 8-port GBE SPAs installed)
Cisco SCE8000 GBE #1
• Traffic ports are connected as usual (see Ta ble 6-1)
• Port 3/2/0 (1-port 10GBE SPA): Cascade, connect to Port 3/2/0 in Cisco SCE8000 GBE #0
• Port 3/3/0 (1-port 10GBE SPA): Cascade, connect to Port 3/3/0 in Cisco SCE8000 GBE #0 (only if
there are two 8-port GBE SPAs installed)
Inline topologies require connecting both Receive and Transmit fibers to the Cisco SCE8000 GBE.
Cascade ports always require both Receive and Transmit fibers to be connected.
To maintain link continuity at all times, optical bypass modules must be installed on both platforms and
the traffic ports must be connected to these bypass modules.
The Optical Bypass Module
The external optical bypass module is an optional component that provides additional protection by
enabling automatic preservation of the network traffic link. For more information regarding the external
bypass module, refer to The Cisco SCE8000 GBE Optical Bypass, page 2-10.
There are two installation options for the optical bypass module:
• Chassis mount—The optical bypass module may be installed in the panel in slot #4 of the Cisco
SCE8000 GBE chassis. This panel hosts up to four optical bypass modules.
• External mounting panel: —The optical bypass module may be installed in a panel that is mounted
in a 19" rack. This panel can host up to four optical bypass modules.
Note Make sure to use the correct type of optical bypass module (single-mode or multi-mode) according to
the transceivers and cabling that are used for the subscriber and network links.
Note Since the optic bypass module will directly connect the subscriber and network side optic paths when
bypassing the SCE8000 GBE, the subscriber and network optic links must be of the same type
(single-mode or multi-mode) and wavelength.
Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Avoid exposure to
radiation and do not stare into open aperture.