ASR 5000 Hardware Platform Overview
â–„ ASR 5000 Installation Guide
Optical Line Card (OLC2)
The OLC2 is labeled OLC2 OC-3/STM-1 Multi Mode (or Single Mode depending on SFP type). The OLC2 supports
either OC-3 or STM-1 signaling and ATM.
The OLC2 support both SDH and SONET. The basic unit of framing in SDH is STM-1 (Synchronous Transport Module
level - 1), which operates at 155.52 Mbps. SONET refers to this basic unit as STS-3c (Synchronous Transport Signal -
3, concatenated), but its high-level functionality, frame size, and bit-rate are the same as STM-1.
SONET offers an additional basic unit of transmission, STS-1 (Synchronous Transport Signal - 1), operating at 51.84
Mbps—exactly one third of an STM-1/STS-3c. The OLC2 concatenates three STS-1 (OC-1) frames to provide
transmission speeds up to 155.52 Mbps with payload rates of 149.76 Mbps and overhead rates of 5.76 Mbps.
The OLC2 optical fiber line card supports network connectivity through Iu or IuPS interfaces to the UMTS Terrestrial
Radio Access Network (UTRAN). These interfaces are commonly used with our SGSN products to provide either non-
IP 3G traffic or all IP 3G traffic (for all-IP packet-based networking) over ATM (Asynchronous Transfer Mode).
Each OLC2 provides four physical interfaces (ports) that are populated by Small Form-factor Pluggable (SFP) modules
which include LC-type connectors. The Optical (ATM) line card supports two types of SFP modules (ports) and
applicable cabling, but each card supports only one type at-a-time, as indicated in the following table.
Table 18. SFP Modules Supported by the OLC2
Single-mode
Optical Fiber
Single-mode Fiber, LC
duplex female connector
Fiber Types: Single-mode optical fiber
Wavelength: 1310 nm
Core Size: 9 micrometers
Cladding Diameter: 125 micrometers
Range: Intermediate/21 kilometers
Attenuation: 0.25 dB/KM
Min/Max Tx Power: -15 dBm/-8 dBm
Rx Sensitivity: -28 dBm
Multi-mode Fiber, LC
duplex female connector
Fiber Types: Multi-mode optical fiber
Wavelength: 1310 nm
Core Size: 62.5 micrometers
Cladding Diameter: 125 micrometers
Range: Short/2 kilometers
Min/Max Tx Power: -19 dBm/-14 dBm
Rx Sensitivity: -30 dBm
The OLC2 supports the Star Channel (1 Gbps) for faster FPGA upgrades and is Restriction of Hazardous Substances
(RoHS) 6/6 compliant.
Install the OLC2 directly behind its respective (active) packet processing card. As with other line cards, install the
Optical (ATM) Line Card in slots 17 through 23, 26 through 39, and 42 through 48.The following figures show the
panel of the OLC2, indicating its ports and major components.
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