ATM OC-12c/STM-4c Intermediate Reach Card
2-4 SmartEdge 1200 Router Hardware Guide
Table 2-2 lists the specifications for the Enhanced ATM OC-12c/STM-4c IR card.
Table 2-2 ATM OC-12c/STM-4c IR Card Specifications
Specification Value
General
Number of ports
1
1. Each optical port has separate connectors for the transmit (Tx) and receive (Rx) circuits.
1
Speed 622.08 Mbps
Protection (facility) 1+1 APS: Bidirectional or unidrectional;
revertive or nonrevertive switching
Interface Telcordia IR-1, SDH/STM-4 S-4.1
Link power budget
2
2. The link power budget is calculated using (minimum output power) – (minimum sensitivity) –
(optical path power penalty); the power penalty is 1.
12 dB
Nominal wavelength 1,310 nm
Connector type LC
Cable type SMF
Compliance Telcordia GR-253, ANSI T1.102, ITU
G.95 7
Transmitter
Optical output power –8.0 dBm (maximum)
–15.0 dBm (minimum)
Extinction ratio 8.2 dB (minimum)
Center wavelength range 1,274 to 1,356 nm
Spectral width (RMS) 2.5 nm (maximum)
Receiver
Wavelength range 1,274 to 1,356 nm
Minimum sensitivity –28 dBm
Overload level –8.0 dBm (minimum)
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