Cisco ASR 5000 Series, Обзор продукта

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ASR 5000 Hardware Platform Overview
▀ ASR 5000 Line Cards
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
Number Description
4
Gigabit Ethernet Interface(s)—10 Gigabit Ethernet (GE) SFP+ modules. 10Base-SR and 10Base-LR interfaces are
supported, depending on the SFP+ module installed.
Optical Line Cards (OLC and OLC2)
There are two optical fiber line cards: OLC and OLC2. The OLC is labeled ATM/POS OC-3. The OLC2 is labeled
OLC2 OC-3/STM-1 Multi Mode (or Single Mode depending on SFP type). Both cards provide either OC-3 or STM-1
signaling and both support ATM. The primary difference between the two cards is that the OLC2 is RoHS 6/6
compliant. RoHS stands for Restriction of Hazardous Substances. It is the European Union directive for restricting the
use of six hazardous substances in the manufacture of electrical components
The OLC/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 Mbit/s. 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
Mbit/s—exactly one third of an STM-1/STS-3c. The OLC/OLC2 concatenates three STS-1 (OC-1) frames to provide
transmission speeds up to 155.52 Mb/s with payload rates of 149.76 Mb/s and overhead rates of 5.76 Mb/s.
The OLC/OLC2 optical fiber line cards support 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).
SFP Modules supported by the Optical (ATM) Line Card
Each OLC/OLC2 provides four physical interfaces (ports) numbered top-to-bottom from 1 to 4 and populated by Small
Form-factor Pluggable (SFP) modules which include LC-type Bellcore GR-253-CORE compliant 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:
Module Type Card Identification Interface Type Cable Specifications
Single-mode Optical
Fiber ATM/POS OC-3 SM IR-
1 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