Specifications

Appendix A
120
A.12.1 Functional Details
Fiber
The 3R-2.7G-2S fiber to fiber 3R repeater uses a transparent optical line coding and clock data recovery to
provide an optical repeater / transponder function for use in extension or CWDM applications.
Only SFP models are available.
Management
The FRM220-2.7G-2S has a small processor that is used to read the set DIP switches when used stand-alone
or to communicate with the NMC when placed in the managed rack. This model is designed for both stand-alone
use and for management when installed in managed chassis.
When placed in a managed chassis, such as our FRM220-CH20 with NMC (Network Management Controller),
the 2.7G-2S card is configured and monitored through the chassis NMC via console, Telnet, Web HTTP or SNMP.
1. Stand-alone – DIP settings when placed in CH02-AC, serial console when placed in CH02M.
2. Rack management - When placed in NMC managed rack, all other settings can be overridden by the NMC management.
3. 2.7G-2S does NOT support in-band management.
There are two variations of this media converter; the 2.7G-2S converter with two optical ports (Line and Client)
and the 2.7G-3S with three optical ports and support for 1+1 fiber protection.
A.12.2 Installation of SFP Modules
CTC Union supplied SFP modules are of the Bale Clasp type. The bale clasp pluggable module has a bale
clasp that secures the module into the SFP cage.
A.12.2.1 Inserting a Bale Clasp SFP Module into the Cage
Step 1 Close the bale clasp upward before inserting the pluggable module.
Step 2 Line up the SFP module with the port, and slide it into the cage.
A.12.2.2 Removing a Bale Clasp SFP Module
Step 1 Open the bale clasp on the SFP module. Press the clasp downward with your index finger.
Step 2 Grasp the SFP module between your thumb and index finger and carefully remove it from the SFP cage.
Figure A.12.2 Bale Clasp type SFP with bale open