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SM-X-1T3/E3= 1-port clear-channel T3/E3 service module
思科路由器T1/E1 服务扩展模块  
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类型: 思科C8300系列路由器
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Figure 2.      Typical Cisco T3/E3 Service Module Deployments



Specifications

Table 2 lists the product number and description, and Table 3 lists the LED port indicators and status for the Cisco T3/E3 Service Module.

Table 2.       Product Name and Description

Product Number

Description

SM-X-1T3/E3

One-port clear-channel T3/E3 Service Module

Hardware Specifications

DS-3/E3 Specifications

   DSX-3 level interface with dual female 75-ohm BNC coaxial connectors per port (separate RX and TX)

   Full-duplex connectivity at DS-3 rate (44.736 MHz)

   Full-duplex connectivity at E3 rate (34.368 MHz)

   Scrambling and subrate support of major DSU vendors

   Line build-out programmable for up to 450 feet of 734A or equivalent coaxial cable or up to 225 feet for 728A or equivalent coaxial cable

   C-bit or M23 framing for T3; bypass and G.751 framing for E3 (software selectable)

   Binary three-zero substitution (B3ZS) (T3) or high-density bipolar with three zeros (HDB3) (E3) line coding

   Support for 16- and 32-bit CRC (16-bit default)

   DS-3 FEAC channel support

   Twenty-four-hour history maintained for error statistics and failure counts

   DS-3 alarm and event detection (once-per-second polling)

   AIS

   OOF

   Line code violation (LCV)

   Excessive zeros (EXZ)

   Far-end receive failure (FERF)

Table 3.       LED Port Indicators and Status

LED Indicator

Color

Active State Description

CD

Green

Carrier detect. A signal is present on the port.

LP

Yellow

Loopback mode is on.

AIS

Yellow

Port is receiving AIS.

FERF

Yellow

Port is receiving FERF signal.

EN

Yellow

Service module is enabled.

Alarm

Yellow

Alarm Indicates LOF (Loss of Frame)

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