3Com S26x, S27x, S24x User Manual

3Com® Corporation

PathBuilder™ S24x, 26x, and 27x Switch

Installation Manual

Notice

© 1998 3Com Corporation 5400 Bayfront Plaza

®

Santa Clara, CA 95052-8145 [phone]

All rights reserved. Printed in U.S.A.

Portions reprinted with the permission of Motorola, Inc.

Restricted Rights Notification for U.S. Government Users

The software (including firmware) addressed in this manual is provided to the U.S. Government under agreement which grants the government the minimum “restricted rights” in the software, as defined in the Federal Acquisition Regulation (FAR) or the Defense Federal Acquisition Regulation Supplement (DFARS), whichever is applicable.

If the software is procured for use by the Department of Defense, the following legend applies:

Restricted Rights Legend

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the

Rights in Technical Data and Computer Software clause at DFARS 252.227-7013.

If the software is procured for use by any U.S. Government entity other than the Department of Defense, the following notice applies:

Notice

Notwithstanding any other lease or license agreement that may pertain to, or accompany the delivery of, this computer software, the rights of the Government regarding its use, reproduction, and disclosure are as set forth in FAR 52.227-19(C).

Unpublished - rights reserved under the copyright laws of the United States.

Notice (continued)

Proprietary Material

Information and software in this document are proprietary to 3Com (or its Suppliers) and without the express prior permission of an officer of 3Com, may not be copied, reproduced, disclosed to others, published, or used, in whole or in part, for any purpose other than that for which it is being made available. Use of software described in this document is subject to the terms and conditions of the 3Com Software License Agreement.

This document is for information purposes only and is subject to change without notice.

Part No. T0004, Rev. F

First Printing October 1998

Manual is current for Release 5.2M.

Contents

Chapter 1. About the PathBuilder S24x, 26x, and 27x switch

Applications ..................................................................................................	1-3
Features and Protocols ..................................................................................	1-7
Hardware Components .................................................................................	1-8
Enclosure ..................................................................................................	1-11
Motherboard .............................................................................................	1-12
Back Panel ................................................................................................	1-16
TI Dual Port Digital PBX Interface Card .................................................	1-17
E1 Dual Port Digital PBX Interface Card ................................................	1-20
DSPM/SM Card .......................................................................................	1-23
DSPM Card with Analog E&M Interface ................................................	1-26
Setting Jumpers for DSPM Card with Analog E&M Interface ................	1-29
DSPM Card with FXS Analog Interface ..................................................	1-32
DSPM Host Card with FXO Analog Interface ........................................	1-35
-48V Ringer/Power Supply Card and Enclosure .....................................	1-38
10BaseT Transceiver ................................................................................	1-41
Radio Frequency Interference Regulations ..................................................	1-42
Telecommunications Regulations .................................................................	1-43
FCC and Telephone Company Procedures and Requirements .....................	1-45
FCC Information ..........................................................................................	1-46
Chapter 2. Preparation and Unpacking
Before Installing Your PathBuilder S24x, 26x, and 27x Switch ..................	2-2
Unpacking .....................................................................................................	2-4
The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit ......................	2-5
Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack	2-8
Chapter 3. PathBuilder S24x, 26x, and 27x Switch Hardware Installation
Setting DIP Switches ....................................................................................	3-3
Installing the DSU DIM ...............................................................................	3-4
Configuring the PathBuilder S24x, 26x, and 27x Switch for DSU Operation	3-7
DSU Input and Output Signaling .................................................................	3-8
Troubleshooting DSU Installation ................................................................	3-11
Installing DIMs .............................................................................................	3-12
Installing SIMMs ..........................................................................................	3-14
Installing I/O Cards ......................................................................................	3-16
Installing a T1 or E1 Dual Port Digital PBX Interface Card ........................	3-17
Installing the T1/CSU Daughter Card ......................................................	3-19
Cabling the PathBuilder S24x, 26x, and 27x Switch ...................................	3-22
Installing the Transceiver .............................................................................	3-23
Power-Up Diagnostics/Verification ..............................................................	3-24
Installing Software Options ..........................................................................	3-26
Full Mesh Cluster Cabling ............................................................................	3-27

v

Contents (continued)

Chapter 4. Maintenance

Removing/Replacing Top Cover ..................................................................	4-3
Removing/Replacing Front Panel Cover ......................................................	4-5
Removing/Replacing Power Supply .............................................................	4-7
Removing/Replacing PathBuilder S24x, 26x, and 27x Switch Cards ..........	4-9
Replacing PathBuilder S24x, 26x, and 27x Switch Motherboard ................	4-12
Removing/Replacing the Lithium Battery ....................................................	4-14
Chapter 5. Channelized Data
Application Example ....................................................................................	5-2
Configuring Channelized Data .....................................................................	5-3
Configuring T1 and E1 Physical Ports .....................................................	5-5
T1 Port Parameters ...................................................................................	5-7
E1 Port Parameters ...................................................................................	5-13
Configuring Virtual Ports on the PathBuilder S24x, 26x, and 27x Switch	5-18
Configuring Virtual Port Mapping Table .................................................	5-20
Appendix A. Cables
Ethernet Cable Pinouts .................................................................................	A-6

Appendix B. PathBuilder S24x, 26x, and 27x Switch Specifications

Appendix C. PathBuilder S24x, 26x, and 27x Switch Error Codes

Appendix D. Technical Support

Index

vi

	About This Manual
Overview
Introduction
	This manual describes features, hardware, specifications, and applications for the
	3Com PathBuilder S24x, 26x and 27x switch.
Audience
	This manual is intended for operators of the 3Com PathBuilder S24x, 26x and 27x
	switch.

How to Use This The following table describes the contents of this manual.

Manual

This Chapter...	Describes:
Chapter 1	PathBuilder S24x, 26x and 27x switch hardware and
	software features, and FCC and Telephone Company
	procedures and requirements.
Chapter 2	Setting up a PathBuilder S24x, 26x and 27x switch,
	including site preparation, how to unpack the unit, and
	installation procedures.
Chapter 3	Installing the hardware on the PathBuilder S24x, 26x
	and 27x switch, powerup and verification, and installa-
	tion of software options.
Chapter 4	Maintaining the PathBuilder S24x, 26x and 27x switch
	including replacement of cards and motherboard.
Chapter 5	Channelized Data option for the PathBuilder S24x, 26x
	and 27x switch.
Appendix A	Cable pinouts for Ethernet.
Appendix B	Product specifications.
Appendix C	Error Codes
Appendix D	Technical Support

Special Notices The following notices emphasize certain information in the manual. Each serves a special purpose and is displayed in the format shown:

Caution

Caution provides you with information that, if not followed, can result in damage to software, hardware, or data.

Mise en Garde

Une mise en garde vous fournit des informations qui, si elles ne sont pas observées, peuvent se traduire par des dommages pour le logiciel, le matériel ou les données.

vii

About This Manual (continued)

Vorsicht

Ein Vorsichtshinweis macht Sie darauf aufmerksam, daß Nic htbefolgung zu Software-, Hardwareoder Datenschäden führen kann.

Warning

Warning is the most serious notice, indicating that you can be physically hurt.

Avertissement

Un avertissement constitue le message le plus sérieux, indiquant que vous pouvez subir des blessures corporelles.

Warnung

Eine Warnung ist der ernsthafteste Hinweis auf Körperverletzungsgefahr.

Trademarks	PathBuilder is a trademark of 3Com Corporation.

viii

	Chapter 1
	About the PathBuilder S24x, 26x, and 27x switch
Overview
What is the
	The PathBuilder S24x, 26x, and 27x switch is a multi-protocol LAN/WAN
PathBuilder S24x,	PathBuilder S200 series switch featuring a high-speed processor and coprocessor
26x, and 27x	coupled with 12 Mbytes of on-board memory (standard). Designed to address the
switch?	needs of large branch offices with higher throughput needs and regional
	concentration sites, the PathBuilder S24x, 26x, and 27x switch is available in rack-
	mount configurations.
	The PathBuilder S24x, 26x, and 27x switch’s high performance capabilities are
	uniquely matched to branch applications with high traffic requirements.
	As a regional concentrator, the PathBuilder S24x, 26x, and 27x switch accepts traffic
	from many branch locations into a single site and transfers the traffic to other devices
	at the regional or central site.
	The PathBuilder S24x, 26x, and 27x switch supports both Frame Relay and X.25.

About the PathBuilder S24x, 26x, and 27x switch

1-1

Meshed Cluster	A unique feature of the PathBuilder S24x, 26x, and 27x switch is its ability to
Application	support full meshed cluster applications. This functionality provides host site
Support	resiliency, port count extension, and multiple LAN connectivity.
	Examples of how the features of the PathBuilder S24x, 26x, and 27x switch function
	in specific applications can be found the “Applications” section on page 1-3.
	Figure 1-1 shows a PathBuilder S24x, 26x, and 27x switch.

®

Figure 1-1. PathBuilder S24x, 26x, and 27x Switch

1-2	About the PathBuilder S24x, 26x, and 27x switch

	Applications
Applications
Introduction
	This section briefly describes several application examples for the PathBuilder S24x,
	26x, and 27x switch.
Performance
	Because of its high performance capabilities, the PathBuilder S24x, 26x, and 27x
Branch Nodes	switch can be employed in a variety of branch node applications. For example, the
	PathBuilder S24x, 26x, and 27x switch can support a mix of voice and data types,
	traditional legacy (SDLC, X.25, Bisync, Async, etc.), and LAN. Because of its high
	throughput, the PathBuilder S24x, 26x, and 27x switch can be used in situations
	where large file transfers, fast response time, and high numbers of users are the
	norm. Figure 1-2 is an example of a typical branch node application.
	Furthermore, the PathBuilder S24x, 26x, and 27x switch is designed to meet the
	needs of an expanding network. With its large RAM capacity and high-speed
	processor, the PathBuilder S24x, 26x, and 27x switch can easily adapt to a growing
	network with little or no additional hardware.

PB S200

SNA

Public

or Private

Network

Figure 1-2. Performance Branch Node Example

About the PathBuilder S24x, 26x, and 27x switch

1-3

Applications

Regional	In Figure 1-3, the public network (Frame Relay/X.25) is performing the branch
Concentrator	concentration function with the PathBuilder S24x, 26x, and 27x switch routing the
	traffic to the appropriate end point. In Figure 1-4, the PathBuilder S24x, 26x, and
	27x switch acts as the regional concentrators, receiving traffic from dozens and even
	thousands of remote sites, and concentrating the traffic before forwarding it to the
	correct location. In this case, the PathBuilder S24x, 26x, and 27x switch is the
	regional site.

In both examples, the PathBuilder S24x, 26x, and 27x switch could be either a single node or a group of nodes networked together as a cluster. The PathBuilder S24x, 26x, and 27x switch’s cluster feature is described below.

		Central Site
	Branch 1	PB S200
	PB S200
		Frame Relay
		or X.25
	Branch XX	(Single Node or Cluster)
		PBX
	PB S200
		Host

Figure 1-3. Regional Concentrator With Public Network Example

1-4	About the PathBuilder S24x, 26x, and 27x switch

Applications

Central Site

High-Speed Link

	Branch 1		PB S200

PB S200

(Single Node or Cluster)

Branch XX

PBX

PB S200

Host

Figure 1-4. Regional Concentrator Example

Cluster Application An important new feature available with the PathBuilder S24x, 26x, and 27x switch is its use in a cluster. This allows as many as four PathBuilder S24x, 26x, and 27x switches to act a single unit for the purposes of connectivity. Though configured and managed as individual nodes, when the PathBuilder S24x, 26x, and 27x switches are clustered together, devices attached to access ports on one node can have calls routed out the network port of one of the other nodes.

The three high-speed ports on the PathBuilder S24x, 26x, and 27x switch motherboard provide networking channels between the nodes to pass traffic from network ports to access ports. The PathBuilder S24x, 26x, and 27x switch cluster allows for high port count and throughput primarily in support of the regional concentrator applications.

The example in Figure 1-5 is a full mesh cluster which means that any access link can reach any host connection. If a PathBuilder S24x, 26x, and 27x switch node within the cluster fails, only those links and host connections directly connected to that node go down. Placement of host equipment, and use of redundant host equipment can minimize the impact of any individual node failure. Furthermore, Link Back Up features in the remotes can limit the degree of remote isolation if part of the PathBuilder S24x, 26x, and 27x switch cluster fails.

About the PathBuilder S24x, 26x, and 27x switch

1-5

Applications

16 Access Ports

16 Access Ports

16 Access Ports

16 Access Ports

PB S200

PB S200

PB S200

PB S200

High-Speed Network Links to other Sites or Backbone LAN Connectors

Figure 1-5. PathBuilder S24x, 26x, and 27x Switch Cluster Example

1-6	About the PathBuilder S24x, 26x, and 27x switch

		Features and Protocols
Features and Protocols
Description
		For a complete listing of the features and protocols supported by your PathBuilder
		S24x, 26x, and 27x switch, refer to the Software Release Notice that came with the
		operating software.

About the PathBuilder S24x, 26x, and 27x switch

1-7

Hardware Components

Hardware Components

PathBuilder S24x, 26x, and 27x Switch Hardware Configuration

The PathBuilder S24x, 26x, and 27x switch comes in a rack-mountable configuration.

The switch contains a motherboard/CPU board, a built-in power supply, and an ISA bus for up to eight additional interface cards. The PathBuilder S24x, 26x, and 27x switch has three available serial ports, an Ethernet port, and a CTP port, FLASH memory, and battery-powered configuration backup. It is easily expanded by adding option cards to the industry standard ISA bus.

Figure 1-6 shows a rack-mountable PathBuilder S24x, 26x, and 27x switch.

SSN	Status	Numeric
Label	LEDs	LED
		PO WER
		S TAT U S
		SE R VI CE
		®
		PathBuilder
		S200 Series
		RESET
Front View		Reset
		Button

		Product ID	AUI Port 4	Power
		Label	(Ethernet Routing)	Supply
				Product
				ID Label
	Rear View		Serial/Network	115/230 VAC
	Expansion
		I/O Ports 1, 2, 3, 6		Voltage
	Card Ports
				Select
	Slots 1 through 8
				Switch
	Figure 1-6. PathBuilder S24x, 26x, and 27x Switch

Optional -48V

Power Supply

1-8	About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Hardware	This table lists and briefly describes the hardware components that make up the
Components	PathBuilder S24x, 26x, and 27x switch. More detailed descriptions of these
	components follow.
	Component	Description
	Enclosure	A rack-mount unit that contains all the PathBuilder S24x,
		26x, and 27x switch processor cards.
	Back Panel	Contains power outlets, power switch, communication ports,
		and slots for I/O cards.
	Motherboard	Contains five data ports:
		• Ports 1 and 2 are DIM ports
		• Port 3 is a high-speed/V.36 DTE port
		• Port 4 is the Ethernet AUI port
		(see below for limitations)
		• Port 6 is reserved for the control terminal port
		Contains eight full-size expansion slots.
	Integral DSU DIM	An option used in installations requiring connection to a
	(Optional)	DDS interface conforming to AT&T 62310 or
		ANSI T1E1.4/91-006, and running at 56 kbps.
	10Base2	Lets you accommodate different network configurations
	Transceiver for AUI	through the user-selectable Signal Quality Error (SQE)
	ports (optional)	function.
	T1 Dual Port	The T1 dual port digital PBX interface card supports digital
	Digital PBX	voice communications, providing integrated network access.
	Interface Card	The T1 digital interfaces are used for both voice and data
	PathBuilder S24x,	traffic.
	26x, and 27x
	E1 Dual Port	The E1 dual port digital PBX interface card supports digital
	Digital PBX	voice communications, providing integrated network access
	Interface Card	(see Figure 1-12).
		The E1 interface card is used to support both voice and data
		traffic.
	DSPM/SM	The DSPM/SM card, used at nodes with digital PBX
		interfaces, compresses four digital voice channels. It has no
		external I/O capabilities.
	DSPM with FXS	The analog DSPM/FXS card allows the PathBuilder S24x
	Analog Interface	switch to support up to two voice/fax channels per card. Each
		DSPM/FXS card occupies one ISA slot in the PathBuilder
		S24x switch.
	DSPM with FXO	The analog FXO daughtercard (when mounted on the
	Analog Interface	DSPM/HC) allows the PathBuilder S244 and S254 switch to
		support one voice/fax channel per card. Each DSPM/HX
		with FXO daughtercard combination occupies one ISA slot
		in the PathBuilder S244 and S254 switch.

About the PathBuilder S24x, 26x, and 27x switch

1-9

Hardware Components

Component	Description (continued)
DSPM with E&M	The PathBuilder S26x switch Analog DSPM/E&M card
Interface	allows the PathBuilder S26x switch to support up to two (2)
	voice/fax channels per card. Each E&M card occupies one
	ISA slot in the PathBuilder S26x switch. The PathBuilder
	S26x switch E&M card supports both twoand four-wire
	interfaces.

Ethernet Port 4

Limitations

Consider these limitations when using the Ethernet Port 4:

• The port does not support Bridging (refer to the Bridging Option,

Part No. T0008-16). When configuring this port, you are not prompted for the bridge link number.

•The port does not support SLAC.

•When configuring the Ethernet Port 4, you are not prompted for the connector type. Ethernet Port 4 only supports AUI.

1-10	About the PathBuilder S24x, 26x, and 27x switch

	Hardware Components
Enclosure
Introduction
	This section provides detailed information about the parts of the PathBuilder S24x,
	26x, and 27x switch enclosure.
Front Panel
	The PathBuilder S24x, 26x, and 27x switch front panel (see Figure 1-6) has:
	• Three status LEDs
	• A 2-character numeric LED display
	• A RESET switch
Status LEDs
	The three status LEDs are:
	• Power (green) — When on, indicates that power is on and all DC voltages are
	within specifications.
	• Status (green) — When on, indicates that the PathBuilder S24x, 26x, and 27x
	switch node is executing either a power-up diagnostic or a software download.
	This LED is normally off.
	• Service (yellow) — When on, indicates a hardware failure. This LED is
	normally off.
Numeric LED
	The 2-character numeric LED display provides system diagnostic codes. When the
Display	Service LED is on, a 2-digit code on the numeric LED display corresponds to a
	certain event.
Reset Switch
	The RESET switch resets the node. Pressing the RESET switch is the equivalent of a
	power-up operation which clears all existing calls and brings down all links.
Power Supply
	The power supply is mounted at the top rear of the chassis. The AC switchable power
	supply can operate at a nominal 110 or a nominal 230 Volts. For information about
	maintaining and replacing the power supply, refer to Chapter 4, Maintenance.

Note

For this unit, the -48VDC Power Option is also available.

About the PathBuilder S24x, 26x, and 27x switch

1-11

Hardware Components

Motherboard

Parts of the	This section describes some of the components that make up the PathBuilder S24x,
Motherboard	26x, and 27x switch motherboard. In addition, this section describes some of the
	daughtercards that can be found on the motherboard, shown in Figure 1-7.
				Power Supply			DRAM SIMM
				Ringer Status			Slots 1 and 2

	Port 1	Flash SIMM Slot
	Port 2	Optional Flash
		SIMM Slot
	Port 3	CMEM SIMM Slot
	Etherspan	Data Compression
		SIMM Slot
	AUI
		Global DRAM
	Port 4
		SIMM Slot

Port 6

LED Connector

1

2

3

Port 1

4

5

DIMs

6

7

Port 2

8

Switch 2 Switch 1

Figure 1-7. Motherboard

RAM

The PathBuilder S24x, 26x, and 27x switch comes standard with 16 Mbytes of local

DRAM for image execution and 8 Mbytes of global memory for buffer storage.

Ports

There are four serial data port DB-25 connectors for network or access functions

(2.048 Mbps):

•Ports 1 and 2 (DB 25) are Data Interface Module (DIM) ports

•Port 3 (DB 25) is a V.36 DTE port

•Port 4 (DB 15) is an Ethernet AUI port

•Port 6 (DB25) is the Control Terminal Port (EIA232)

1-12	About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

FLASH SIMM	The FLASH Single In-line Memory Module (SIMM) holds a compressed image of
	the operating software. This module is electrically erasable and reprogrammable.
	An optional FLASH SIMM can be installed for backup. These modules are installed
	in one of the SIMM slots (1 or 2). Figure 1-8 shows the SIMM.

			Figure 1-8. FLASH SIMM
					Note
					The chips on your SIMM may vary from the one shown inFigure 1-8.
CMEM SIMM
			The Configuration Memory Module (CMEM) SIMM has 512 Kbytes of memory and
			provides the real time clock function. The CMEM is backed up by a lithium battery
			in case of a power disruption.
			Each PathBuilder S24x, 26x, and 27x switch has a Software Serial Number (SSN)
			burned into a PROM located on the CMEM card. This SSN is used to verify the
			software options that are enabled for that node. It is on the CMEM SIMM card for
			easy removal and replacement in case of a motherboard failure.
			The CMEM is installed in the SIMM slot (see Figure 1-7 for slot location).
			Figure 1-9 shows the CMEM.
				Warning
			Only qualified service personnel should perform the procedure described in this
			section. If the battery is installed incorrectly, it could explode after the PathBuilder
			S200 series switch product is powered up, damaging the unit.
				Avertissement
			Seules des personnes qualifiées peuvent mettre en pratique les procédures décrites
			dans cette section. Si la batterie n’est pas correctement installée, elle risque
			d’exploser après la mise en marche du produit PathBuilder S200 series switch et
			d’endommager l’unité.
				Warnung
			Die in diesem Abschnitt aufgeführten Vorgänge sollten ausschließlich von
			qualifiziertem Servicepersonal durchgeführt werden. Wenn die Batterie
			unsachgemäß installiert wird, kann sie nach dem Einschalten des PathBuilder S200
			series switch-Produkts explodieren

About the PathBuilder S24x, 26x, and 27x switch

1-13

Hardware Components

Lithium Battery

Figure 1-9. CMEM SIMM

Expansion Port The PathBuilder S24x, 26x, and 27x switch motherboard has eight full-size

I/O Slots expansion card slots (see Figure 1-6). Expansion I/O cards have I/O connectors that extend through the rear panel.

Port numbers for the ports on the I/O cards have a fixed relationship to the chassis expansion slot number. Six port numbers are reserved for each slot. If a slot contains an I/O card that does not support the full port count reserved for that slot, or the slot is empty, the extra port numbers remain unused.

Slot Number and This table shows the port numbers associated with each card type.

Port Numbers

	Slot Number	Port Number	Associated Card
	Motherboard I/O	1-6	Motherboard
	1	7-12	Voice cards (E & M, FXS,
			Server Module, T1, E1).
	2	13-18
			The T1/E1 is restricted to
	3	19-24
			Slot 8.
	4	25-30
	5	31-36
	6	37-42
	7	43-48
	8	49-54
Description of
	Ports 1 through 3 are connected to the motherboard with ribbon cables. Ports 1 and 2
Serial/Network	are DIM ports and are functional only if a DIM is present. Port 3 is a dedicated V.36
Ports	DTE port.

Ports 1, 2, 3, and 6 on the rear panel of the chassis are DB-25 female connectors. Port 4, (the Ethernet AUI port) uses a DB-15 connector. Ports 1 and 2 may require adapters, depending on the DIM used. An adapter cable is available for Port 3.

1-14	About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

How Ports Are The following table describes how the ports are used.

Used

Port Number	Use
1, 2, and 3	Recommended for network port connection or cluster
	connectivity. Ports 1 and 2 have variable interfaces, depending
	on the DIMs.
4	Ethernet AUI port for routing applications.
6	Control Terminal Port (CTP). When operating as an
	asynchronous interface, it can support data rates up to 115.2
	kbps. Default CTP configuration parameters are 9600 baud,
	8-bit characters, 1 stop bit, no parity. This is an EIA 232-D
	DCE port using a DB-25 connector.

DIMs without a Cable Adapter

DIMs with a Cable Adapter

Ports 1 and 2 support a DSU DIM without the use of cable adapters.

If cable adapters are used, Ports 1 and 2 can support the following DIMs:

•High Speed (V.36)

•V.35

•V.11/ISO-4903

Each DIM port can be configured independently of the other port. For example, you can install: two V.35 DIMs; one V.35 DIM and one V.11 DIM; or two V.11 DIMs.

The cable adapter pinouts are described in Appendix A, Cables.

About the PathBuilder S24x, 26x, and 27x switch

1-15

Hardware Components

Back Panel

Back Panel

Components

The components of the back panel are:

•Serial/Network I/O Ports. Ports 1, 2, 3, and 6 are DB-25 connectors. Port 4 is a DB 15 connector.

•AC Power Supply. The rear of the Power Supply has two (male and female) power source connectors (one is for connection to an AC source and the other is an AC outlet) along with a selectable 115 VAC or 230 VAC switch. For most international usage, the switch must be set for 230 VAC.

•DC Power Supply. The unit can be shipped with the -48VDC Power Option. The terminal block of the -48VDC has 5 screws. The two outermost screws are for attachment. The negative wire terminal is second from the left; the positive wire terminal is in the middle; the ground is second from the right.

•Expansion Card Ports. The expansion card ports differ depending on what card is installed in that slot.

Figure 1-10 shows the PathBuilder S24x, 26x, and 27x switch back panel.

Optional -48V

Power Supply

Power
Supply
	115/230 VAC
	Voltage Select
AUI Port 4	Switch
(Ethernet Routing)
	Serial/Network
	I/O Ports 1,2, 3, 6
Product
ID Label
	Expansion
	Card Ports
	Slots 1 through 8

Figure 1-10. PathBuilder S24x, 26x, and 27x Switch Back Panel

1-16	About the PathBuilder S24x, 26x, and 27x switch

	Hardware Components
TI Dual Port Digital PBX Interface Card
Introduction
	The T1 dual port digital PBX interface card supports digital voice communications,
	providing integrated network access. The T1 interface card is installed primarily in
	North America and Japan. A 2-megabyte T1 card is required for passing data and
	voice traffic.

109 8 7 6 5 4 3 2 1 N O

SW1 DIP Switch Bank

MVIP Bus Interface Connector

Port 49 LED	Port 50 LED
Run LED	SysFail LED

		Port 49 Interface
		Port 50 Interface
	ISA Bus Interface	Serial Diagnostic Port (Not Supported)
		Pin 8
		Pin 1
	Figure 1-11. T1 Dual Port Digital PBX Interface Card
Description
	Each T1 dual port digital PBX interface card uses an Industry Standard Architecture
	(ISA) bus interface and a Multi-Vendor Integration Protocol (MVIP) bus interface.
	The MVIP bus interface provides multiplexed digital access within the PathBuilder
	S24x, 26x, and 27x switch chassis.
Function
	T1 dual port digital PBX interface cards provide the digital interfaces for
	connections to a PBX. The T1 dual port digital PBX interface cards bring PCM voice
	and channel signaling into the node. The PCM voice data and voice signaling is
	routed to a DSPM/SM card over the MVIP bus for compression and transmission to
	the remote end.

About the PathBuilder S24x, 26x, and 27x switch

1-17

Hardware Components

Slot Restriction	The T1 dual port digital PBX interface card occupies slot 8 in the PathBuilder S24x,
	26x, and 27x switch chassis.
DIP Switch
	The T1 dual port digital PBX interface card contains a single DIP switch bank (SW1)
Location	used to assign the card’s I/O base address.
DIP Switch
	Set the DIP switches on the T1 dual port digital PBX interface card as shown in
Settings	Figure 1-11.
T1/CSU Daughter
	The T1/CSU Daughtercard provides a 1.544 MHz point-to-point interface for North
Card	American service that conforms to AT&T 62411/62421 standard. The card is FCC
	Part 68 Registered and uses eternal clocking derived from the telephone network.
	One or two T1/CSU Daughter Cards can be installed onto the T1 Dual Port card. The
	top card supports port 49 and the bottom supports port 50.
	For instructions for installing the T1/CSU card, refer to “Installing the T1/CSU
	Daughter Card” section in Chapter 3.

Required Cables These cables ship with the T1 dual port digital PBX interface card and are required to cable the T1 dual port digital PBX interface card to the DSPM/SM cards in the node.

Cable Description	Function
One 4-position 40-pin	Connects up to 3 DSPM/SM cards to interconnect
MVIP ribbon cable	digital voice traffic between individual cards in the
	same PathBuilder S24x, 26x, and 27x switch node.
One 8-position 40-pin	Connects 4 or more DSPM/SM cards to interconnect
MVIP ribbon cable	digital voice traffic between individual cards in the
	same PathBuilder S24x, 26x, and 27x switch node.
Two 8-pin modular to	3-ft adapter converter cables used to convert the
DB15 cables	8-pin modular connector on the front of the T1/E1
	card to a DB15 connector (Product Code 17269).

1-18	About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

LED Status	The T1 dual port digital PBX interface card contains four LEDs that can be viewed
Indicators	through the rear bracket.
	LED	Color	LED is...	...Indicating
	Port 49		OFF	Normal operation
		Yellow	ON	Carrier failure on Port 49span
	Port 50		OFF	Normal operation
		Yellow	ON	Carrier failure on Port 50 span
	RUN		OFF	Card failure
		Green	ON	Card Active
	SYSFAIL		OFF	Normal operation
		Yellow	ON	Card failure

About the PathBuilder S24x, 26x, and 27x switch

1-19

Hardware Components

E1 Dual Port Digital PBX Interface Card

Introduction	The E1 dual port digital PBX interface card supports digital voice communications,
	providing integrated network access (see Figure 1-12). The E1 interface card is
	installed primarily in Europe and South America. A 2-megabyte E1 card is required
	for passing data traffic and voice traffic.
Description
	Each E1 dual port digital PBX interface card uses an Industry Standard Architecture
	(ISA) bus interface and a Multi-Vendor Integration Protocol (MVIP) bus interface.
	The MVIP bus interface provides a multiplexed digital access within the PathBuilder
	S24x, 26x, and 27x switch chassis.
	The E1 dual port digital PBX interface card has two E1 ports (CAS signaling only),
	handles E1 lines with or without CRC4, and supports 120Ω and 75Ω (with the
	addition of an optional cable). The interface type is 8-pin modular.
Function
	E1 dual port digital PBX interface cards provide the digital interfaces for
	connections to a PBX. The dual port digital PBX interface cards bring PCM voice
	and channel signaling into the node. The PCM voice data and voice signaling is
	routed to a DSPM/SM card over the MVIP bus for compression and transmission to
	the motherboard.
Slot Restriction
	The E1 dual port digital PBX interface card can only occupy slot 8 in the PathBuilder
	S24x, 26x, and 27x switch chassis.

1-20	About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

E1 Dual Port Digital Figure 1-12 shows an example of the E1 dual port digital PBX interface card.

PBX Interface Card Illustration

109 8 7 6 5 4 3 2 1 N O

SW1 DIP Switch Bank

MVIP Bus Interface Connector

Port 49	Port 50
Alarm LED	Alarm LED
Run LED	SysFail LED

		Port 49 Interface
		Port 50 Interface
	ISA Bus Interface	Serial Diagnostic Port
		Pin 6
	Figure 1-12. E1 Digital PBX Interface Card	Pin 1
DIP Switch
	The E1 dual port digital PBX interface card contains a single DIP switch bank (SW1)
Location	used to assign the card’s I/O base address.
DIP Switch
	Set the switches as shown in Figure 1-12.
Settings

About the PathBuilder S24x, 26x, and 27x switch

1-21

Hardware Components

Required cables The following cables, including two pigtail cables, ship with the E1 dual port digital PBX interface card and are required to cable the E1 card to the DSPM/SM cards in the PathBuilder S24x, 26x, and 27x switch node.

		Cable Description			Function
		One 4-position 40-pin		Connects up to three DSPM/SM cards to
		MVIP ribbon cable		interconnect digital voice traffic between individual
				cards in the same PathBuilder S24x, 26x, and 27x
				switch node.
		One 8-position, 40-pin		Connects four or more DSPM/SM cards to
		MVIP ribbon cable		interconnect digital voice traffic between individual
				cards in the same PathBuilder S24x, 26x, and 27x
				switch node.
		Two 8-pin modular to DB15		For 120Ω connection.
		cables
		Two 8-pin modular to BNC		For 75Ω connection.
		cables
LED Status
		The E1 dual port digital PBX interface card contains four LEDs that can be viewed
Indicators		through the rear bracket:
		LED	Color	LED is...	...Indicating
		Port 49	Yellow	OFF	Normal operation
				ON	Carrier failure on Port 49 span
		Port 50	Yellow	OFF	Normal operation
				ON	Carrier failure on Port 50 span
		RUN	Green	OFF	Card failure
				ON	Microprocessor Activity
		SYSFAIL	Yellow	OFF	Normal operation
				ON	Card failure

1-22	About the PathBuilder S24x, 26x, and 27x switch