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Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
OL-17439-01
Chapter 3 Overview: Cisco CRS-1 Shared Port Adapters
2-Port and 4-Port OC-48c/STM-16 POS/RPR SPA Overview
2-Port and 4-Port OC-48c/STM-16 POS/RPR SPA Cables, Optical Transceiver
Modules, and Connectors
Use single-mode optical fiber cable (for intermediate-reach configurations) to connect your router to a
network or to connect two OC-48-equipped routers back to back.
The 2-Port and 4-Port OC-48c/STM-16 POS/RPR SPA supports the following types of optical
transceiver modules:
•
Single-mode short-reach (SR) SFP module—SFP-OC48-SR OC48/STM16c
•
Single-mode intermediate-reach (IR) SFP module—SFP-OC48-IR1 OC48/STM16c
•
Single-mode long-reach (LR) SFP module—SFP-OC48-LR2 OC48/STM16c
Each port on the 2-Port and 4-Port OC-48c/STM-16 POS/RPR SPA has one duplex LC-type receptacle.
For single-mode optical fiber connections, you can use either a duplex LC-type cable (see
Figure 3-15
)
or two simplex LC-type cables, one for transmit (TX) and one for receive (RX).
Figure 3-15
LC-Type Cable
OC-48 Module Connections
Table 3-11
shows the OC-48 specifications for use with the 2-Port and 4-Port OC-48c/STM-16
POS/RPR SPA.
/ /
/ /
/ /
TX
RX
84929
Table 3-11
OC-48 Specifications
Specification
Description
Wavelength
OC-48 SR: 1266 nm to 1360 nm
OC-48 IR-1: 1260 nm to 1360 nm
OC-48 LR-2: 1500 nm to 1580 nm
Cabling distance (maximum)
OC-48 SR: 2 km (1.2 miles)
OC-48 IR-1: 15 km (9.3 miles)
OC-48 LR-2: 80 km (49.7 miles)
Operating case temperature range
OC-48 SR: 23 to 158 degrees F (–5 to 70 degrees C)
OC-48 IR-1: 23 to 158 degrees F (–5 to 70 degrees C)
OC-48 LR-2: 23 to 158 degrees F (–5 to 70 degrees C)
TX power
OC-48 SR: –10 to –3 dBm
OC-48 IR-1: –5 to 0 dBm
OC-48 LR-2: –2 to +3 dBm
Receiver sensitivity (maximum)
OC-48 SR: –18 dBm
OC-48 IR-1: –18 dBm
OC-48 LR-2: –28 dBm
