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Table Of Contents

24-Port Channelized E1/T1 Line Card Overview

Line Card Summary

E1 Features

T1 Features

Software and Hardware Compatibility

Line Card, Router, and Processor Compatibility

LEDs

Physical Specifications

Slot Locations

Cables, Connectors, and Pinouts

Using the BNC Cable Adapter

Pinouts

24-Port Channelized E1/T1 Line Card Overview

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This chapter describes the Cisco 10000 series 24-port channelized E1/T1 line card (referred to as the 24-port channelized E1/T1 line card), and contains the following sections:

•Line Card Summary

•Software and Hardware Compatibility

•Line Card, Router, and Processor Compatibility

•LEDs

•Physical Specifications

•Slot Locations

•Cables, Connectors, and Pinouts

Line Card Summary

Table 5-1 24-Port Channelized E1/T1 Line Card Summary

Product Number	Description	Minimum Cisco IOS Release
ESR-24CT1/E1=	24-port channelized T1/E1 line card	Initial Cisco IOS release for PRE-1: 12.0(22)S and later releases of Cisco IOS Release 12.0S Initial Cisco IOS release for PRE-2: 12.2(15)BX and later releases of 12.2BX 2.2(28)SB and later releases of Cisco IOS Release 12.2(28)SB 12.3(7)XI and later releases of Cisco IOS 12.3XI For registered Cisco.com users, use Software Advisor to determine the software releases for this line card.

The 24-port channelized E1/T1 line card provides Cisco 10000 routers with 24 copper channelized or unchannelized interface ports that you can configure as E1 or T1 interfaces. When you configure a line card for:

•E1 operation—You can configure each E1 port as one or more interfaces for framed (channelized) operation, or as a single channel for unframed (unchannelized) operation.

•T1 operation—You can configure each T1 port as one or more interfaces for framed operation.

E1 Features

The E1 features of this line card support:

•European 2.048 MbpsTU G.703 and G.704 serial interfaces

•Local or network loopback for any E1 port. Network loopback supports:

–Line

–Payload

•CRC4 (cyclic redundancy check) and non-CRC4 framing modes

•Detection of LoS (loss of signal) and LoF (loss of frame)

•Protocol encapsulations:

–High-Level Data Link Control (HDLC)

–Frame relay

–Point-to-Point Protocol (PPP)

•Channel bandwidths of N x 64 kbps in framed E1 mode, where N has a value from 1 to 31, and a single channel bandwidth of 2048 kbps (N = 32) in unframed E1 mode

•Per-port selection of internal or external (line) clock source

•Solutions for service providers where fiber interfaces are unavailable

•Internet service provider interface connections to existing copper Internet Protocol (IP) E1 lines

•Programmable National Reserved bits

•High density bipolar 3 (HDB3) line encoding

•E1-level bit error rate test (BERT) functions

T1 Features

The T1 features of this line card support:

•Alternate Mark Inversion (AMI) or Bipolar with 8-Zeros Substitution (B8ZS) line encoding

•Up to 24 separate interfaces per T1 port

•FDL support:

–Full ANSI T1.403 mode

–ATT 54016 receive-only

–SMARTJACK remote loopback

•Loopback for each T1 port

–Line and payload (types of network loopback)

–Local

–Remote

•Per-port selection of internal or external (line) clock source

•Detection of LoS and LoF

•Short-haul line buildout up to 655 feet

•Super Frame (SF) or Extended Super Frame (ESF) framing modes

•Protocol encapsulations:

–HDLC

–Frame Relay

–PPP

•Channel bandwidths of N x 64 kbps or N x 56 kbps in channelized T1 mode, where N has a value from 1 to 24

•Solutions for service providers where fiber interfaces are unavailable

•Internet service provider interface connections to existing copper Internet Protocol (IP) T1 channels

•T1-level bit error rate test (BERT) functions

If you are a registered Cisco.com user, see Feature Navigator for supported features.

Software and Hardware Compatibility

To check the minimum software requirements of Cisco IOS software with the hardware installed on your router, Cisco maintains the Software Advisor tool on Cisco.com. This tool does not verify whether line cards within a system are compatible, but does provide the minimum Cisco IOS requirements for individual hardware line cards, modules, or options.

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Note Access to this tool is limited to users with Cisco.com login accounts.

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To access Software Advisor, click Login at Cisco.com, type Software Advisor in the search box, and click Go. Click the link for the Software Advisor tool.

Choose a product family or enter a specific product number to search for the minimum supported software release needed for your hardware.

Line Card, Router, and Processor Compatibility

Table 5-2 lists router model, line card, and processor compatibility.

Table 5-2 Line Card, Router, and Processor Compatibility

Line Card	Cisco 10008	Cisco 10005	PRE-2	PRE-1	PRE
24-port channelized E1/T1 line card	Yes	Yes	Yes	Yes	No

LEDs

The 24-port channelized E1/T1 line card LEDs are shown in Figure 5-1.

Figure 5-1 24-Port Channelized E1/T1 Line Card Faceplate Description

1	Top captive screw	6	Ports 0 to 11 status LEDs
2	Top ejector lever	7	Ports 12 to 23 status LEDs
3	FAIL LED	8	Bottom ejector lever
4	Ports 0 to 11 RJ-45 jacks	9	Bottom captive screw
5	Ports 12 to 23 RJ-45 jacks

Table 5-3 provides a description of the 24-port channelized E1/T1 line card LEDs.

Table 5-3 LED Description 

LED Label	Color	State	Meaning
FAIL	Yellow	Off	Off during normal operation. This LED lights momentarily during power-on self test (POST) and then goes out on a properly working line card.
		On	On if a line card fails during operation, and an alarm event occurs.
0-23 (Status LEDs)	Green	On	Carrier Detect LED on indicates that a carrier signal exits at the corresponding port, which is normal interface operation. During loopback testing, this LED also lights green.
		Off	When the LED is off, the port is administratively down.
	Yellow	Off	When this Alarm Active LED is not lit, the port is administratively down.
		On	Alarm Active LED is on when the corresponding port data path is in an alarm condition. The following alarms are monitored: LoS (Loss of Signal), LoF (Loss of Frame), RAI (Remote Alarm Indication), and AIS (Alarm Indication Signal).

Physical Specifications

The 24-port channelized E1/T1 line card physical specifications are shown in Table 5-4.

Table 5-4 24-Port Channelized E1/T1 Line Card Physical Specifications 

Description	Specifications
Physical dimensions	Height: 16.0 in. (40.64 cm) Depth: 9.97 in. (25.32 cm) Width: 1.12 in. (2.83 cm)
Shipping weight	Approximately 4.75 lb (2.16 kg)
Operating temperature	41oF to 104oF (5oC to 40oC) Short-term operating temperature is limited to 131oF (55oC) in compliance with Bellcore GR
Relative humidity	Operating—nominal: 5% to 85% Operating—short term: 5% to 90% Storage: 5% to 95%
Storage temperature	-40oF to 158oF (-40oC to 70C o)

Slot Locations

The line card slot designations are shown in this section. See Figure 5-2 for line card slot designations for the Cisco 10008 router and Figure 5-3 for line card slot designations for the Cisco 10005 router.

Figure 5-2 Line Card Slot Designations for the Cisco 10008 Router

1	Blower module	5	PRE slot 0A
2	Primary PEM	6	PRE slot 0B
3	Redundant PEM	7	Line card slots 5 to 8
4	Line card slots 1 to 4

The 24-port channelized E1/T1 line card can be installed in line card slot 1 through slot 8.

Figure 5-3 Line Card Slot Designations for the Cisco 10005 Router

1	PRE slot A	3	Line card slots 1 (top) to 5 (bottom)
2	PRE slot B

The 24-port channelized E1/T1 line card can be installed in line card slot 1 through slot 5.

Cables, Connectors, and Pinouts

You can use up to 24 Category 3 or Category 5 unshielded twisted pair (UTP) transmit and receive cables with RJ-45 connectors at each end. These cables connect to two staggered 12-line faceplate RJ-45 jacks with 110-ohm balanced-line inputs, which allow the line card to operate in either T1 (100 ohm balanced) or E1 (120 ohm balanced) mode. The faceplate RJ-45 jacks are numbered 0 to 11 and 12 to 23 left-to-right and top-to-bottom.

You can also use a Cisco cable adapter (CAB-ADAPT-75-120=) for coaxial British Navel Connector (BNC) unbalanced transmit and receive E1 connections (see the "Using the BNC Cable Adapter" section).

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Caution If the Cisco 10000 series router is used in an environment in which lightning-induced transients are likely to couple to the signal lines, use of shielded interconnection cables for the E1/T1 ports is highly recommended. In addition, use of shielded interconnection cables for the E1/T1 ports is required to meet Telcordia (formerly Bellcore) GR1089 CORE Section 4.5.9 and ETSI Section 5.2.2.2 (intrabuilding lightning surge).

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Using the BNC Cable Adapter

Figure 5-4 shows the adapter cable available for the 24-port channelized E1/T1 line card.

Figure 5-4 Faceplate, Connecting Cable, and Adapter Cable

1	Adapter cable	3	Connecting cable (RJ-45 STP, male/male)
2	RJ-45 ports on faceplate

An RJ-45 STP cable with two male RJ-45 connectors is required to connect the adapter cable and RJ-45 ports on the face of the line card (Figure 5-5).

Figure 5-5 75-120 Ohm Adapter Cable

Cisco cable adapters (CAB-ADAPT-75-120=) connect 75-ohm unbalanced G.703 E1 coaxial BNC transmit and receive lines to Cisco E1 120-ohm balanced transmit and receive lines.

The connections are made through eight-pin RJ-45 jacks on the 120-ohm side of the adapter cable and dual coaxial lines (transmit and receive) with BNC connectors at the 75-ohm side.

Class A emissions compliance is met when the 120-ohm E1 port is connected to the 75-120-ohm cable adapter using RJ-45 connectors and Category 3 or Category 5 shielded foil twisted-pair (FTP) cable with 120-ohm impedance. Two switches on the 120-ohm side must be configured to connect the outer conductor of the shielded cable to a protected earth ground (see enlargement in Figure 5-5).

Pinouts

Table 5-5 lists pinouts for the RJ-45 connector.

Table 5-5 RJ-45 Port Pinouts

Pin	RJ-45
1	RX tip
2	RX ring
3	No connection
4	TX tip
5	TX ring
6	No connection
7	No connection
8	No connection

Go to Chapter 16, "Preparing for Installation" to begin the installation or replacement of the line card.

For troubleshooting information, see Chapter 18, "Troubleshooting the Installation."