Black Box Multiserver 5000 MX219A User manual

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CUSTOMER
SUPPORT
INFORMATION
OCTOBER 1994
MX219A
MX215C, MX218C
MX222C, MX223C
MX224, MX226C
MX228C, RM220
Multiserver 5000
MULTISERVER 5000
EXE

Multiserver 5000
1
Multiserver 5000
Multiserver 5000 CommPak
MS5 Expansion Module Sync/Async
MS1 Expansion Module—Async only
MS1 Expansion Module—12 Async—RJ-45
MS1 Expansion Module—12 Async—RJ-45 w/Line Drivers
MS1 V.35 Converter/DCE
MS1 X.21 (V.11) Converter
MS1 Rackmount Kit
Installation and Operation Manual
Warning
Access to the interior of the unit for such purposes as replacing fuses,
or any other maintenance-type of procedure, must be performed only by
a qualified technician. Before any such work is performed, the power
supply must be disconnected from the source of power to avoid any
possibility of electrical shock.

Multiserver 5000
2
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment generates, uses, and can radiate radio frequency energy and if not installed an used
properly, that is, in strict accordance with the manufacturer's instructions, may cause interference to radio
communication. It has been tested and found to comply with the limits for a Class A computing device in
accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designed to provide
reasonable protection against such interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause interference, in which case
the user at his own expense will be required to take whatever measures may be required to correct the
interference.
Changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for Radio noise emission from digital apparatus set out in the
Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n'émet pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de la classe A prescrites dans le Règlement sur le brouillage radioélectrique édicté par Industrie Canada.
TRADEMARKS
HP®is a registered trademark of Hewlett-Packard
Hewlett-Packard®is a registered trademark of Hewlett-Packard
HP3000™is a trademark of Hewlett-Packard
IBM®is a registered trademark of IBM Corporation
AS/400®is a registered trademark of IBM Corporation
MICOM®is a registered trademark of Nortel Networks.
Tandem®is a registered trademark of Tandem Computers Incorporated
WANG®is a registered trademark of Gentronics NV.
Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

Table of Contents
3
1. Specifications
Multiserver 5000 (Base Unit) ..................................................................................................13
Expansion Modules..................................................................................................................15
MS1 Voice/Fax Cards ..............................................................................................................16
MS1 56K CSU/DSU Module ...................................................................................................18
MS RLB Module.......................................................................................................................18
MS1 NMS Module....................................................................................................................19
MS1 V.35 Converter/DCE .......................................................................................................19
X.21 Converter/DCE...............................................................................................................19
2. Introduction
2.1 The Multiserver 5000 (Base Unit) ...................................................................................20
2.2 Feeder Muxes ....................................................................................................................21
2.3 The Commpak ..................................................................................................................23
2.4 Expansion Modules...........................................................................................................23
2.5 MS1 Voice/Fax Card.........................................................................................................23
2.6 MS1 56K CSU/DSU Module (MT150C) ........................................................................23
2.7 MS RLB Module (MX229A).............................................................................................23
2.8 MS1 NMS Module (MX227C)..........................................................................................24
2.9 MS1 V.35 Converter/DCE (MX226)................................................................................24
2.10 MS1 X.21 (V.11) Converter (MX228C).........................................................................24
2.11 MS1 Rackmount Kit (RM220)........................................................................................24
2.12 Documentation ...............................................................................................................24
2.13 Manual Text Conventions...............................................................................................25
3. Network Design and Topologies
3.1 Initial Considerations .......................................................................................................26
3.2 Worksheets for the Network .............................................................................................27
3.3 Nodes and Hubs ...............................................................................................................27
3.4 Syntax for Node Numbers and IDs ..................................................................................27
Table of Contents

Multiserver 5000
4
3.5 Default Node Numbers and Node IDs ............................................................................27
3.6 Examples of Network Designs..........................................................................................29
Single Link Point-to-Point.........................................................................................................29
Dual Link Point-to-Point...........................................................................................................30
String..........................................................................................................................................31
Star .............................................................................................................................................32
Distributed Star .........................................................................................................................33
4.0 Base-Unit Installation
4.1 Check Contents.................................................................................................................34
4.2 Plan the Location Based on the Physical Description and Requirements ....................34
4.2 CommPak Cartridge Installation and Removal ..............................................................35
Installing the CommPak Cartridge ..........................................................................................35
Removing the CommPak Cartridge .........................................................................................35
4.3 Power Up the Unit ............................................................................................................35
4.4 LCD Display.......................................................................................................................36
4.5 Checking the CCM Indicators..........................................................................................36
4.6 Identify the Module Locations and Channel Numbers..................................................37
Module Location and Nomenclature ......................................................................................37
Channel Location and Nomenclature.....................................................................................38
5. Module Installation
5.1 Module Stacking Order ....................................................................................................40
5.2 Module-Location Switch Settings.....................................................................................41
5.3 Inter-Module Stacking Connectors..................................................................................42
5.4 Blank Back Panel...............................................................................................................43
5.5 Disassembly Procedures....................................................................................................43
5.5.1 Unplug the Multiserver...................................................................................................43
5.5.2 Remove the Cover ...........................................................................................................44
5.5.3 Remove Blank Back Panels.............................................................................................45
5.5.4 Remove Spacers...............................................................................................................45
5.5.5 Disassembly Considerations............................................................................................46
5.5.6 Removing a Channel Expansion Module (CEM), Voice/Fax Card,
or CSU/DSU Module.....................................................................................................46
Table of Contents (continued)

Table of Contents (continued)
Table of Contents
5
5.5.7 Removing the CCM.........................................................................................................46
5.6 Installation Procedures.....................................................................................................47
5.6.1 Install the Spacers ...........................................................................................................47
5.6.2 Install the CCM................................................................................................................47
5.6.3 Install Channel Expansion Modules ..............................................................................48
5.6.4 Remaining Spacers..........................................................................................................49
5.6.5 Installing Blank Back Panels...........................................................................................49
5.6.6 Put the Cover Back On ...................................................................................................50
5.8 Converters (Optional Equipment) ..................................................................................51
Installing Converters .................................................................................................................51
Removing Converters................................................................................................................51
6. Getting Started
6.1 Multiserver Base Unit Location .......................................................................................52
6.2 Connecting an ASCII Terminal........................................................................................52
6.3 The Command Facility .....................................................................................................53
Access the Command Facility via the Command Mode using ^X <break> ...........................53
Access the Command Facility via $CMD..................................................................................54
Exiting the Command Facility..................................................................................................54
6.4 Reset Defaults....................................................................................................................55
6.6 Name the Local Node.......................................................................................................56
Command Facility Configuration.............................................................................................56
LCD/Keypad Configuration.....................................................................................................57
NMS Switch Configuration .......................................................................................................57
6.6 Quick Setup.......................................................................................................................58
Can You Do a Quick Setup?......................................................................................................58
Preliminary Steps.......................................................................................................................58
The Interconnect Link..............................................................................................................58
The Force-Connection..............................................................................................................59
7. Bench Configuration and Testing
7.1 Overview ............................................................................................................................60
Key to Examples and Illustrations ............................................................................................60
7.2 Using CSU/DSUs with the Interconnect Link................................................................62
Internal CSU/DSU to Internal CSU/DSU..............................................................................62

Multiserver 5000
6
External CSU/DSU to Internal CSU/DSU .............................................................................62
External CSU/DSU to External CSU/DSU.............................................................................62
CCM Indicators .........................................................................................................................62
Final Installation........................................................................................................................62
7.3 Using Modems with the Interconnect Link ....................................................................63
7.4 The Sync Data Channel ....................................................................................................64
7.5 Testing Asynchronous Data Channels .............................................................................66
Async Channels on the Local Node .........................................................................................66
Async Channels Across the Link...............................................................................................66
Configuration ............................................................................................................................66
7.6 Testing the RLB Module...................................................................................................68
ThinNet......................................................................................................................................68
ThickNet, 10BASE-T, and Fiber ...............................................................................................68
Further Configuration ..............................................................................................................68
7.7 Voice/Fax Channels..........................................................................................................69
Force-Connected Voice Channels............................................................................................69
Connect the Phone to the Multiserver ....................................................................................69
The Test .....................................................................................................................................69
8. Link Configuration
8.1 Types of Links....................................................................................................................70
8.2 Avoid Node Duplication...................................................................................................70
8.3 Assign a Port for each Link ..............................................................................................70
8.4 Port Configuration............................................................................................................71
8.5 The Interconnect Link .....................................................................................................72
Port Configuration for the Interconnect Link........................................................................72
Install the Interconnect Link....................................................................................................72
Connecting Multiserver Units back-to-back.............................................................................73
Remote Multiserver Configuration ..........................................................................................73
8.6 The Mux Link....................................................................................................................75
Port Configuration for the Mux Link ......................................................................................75
Install the Mux Link..................................................................................................................75
Feeder Mux Node IDs...............................................................................................................76
8.7 The X.21 Link ...................................................................................................................77
Table of Contents (continued)

Table of Contents (continued)
Table of Contents
7
Introduction to X.21 .................................................................................................................77
Port Configuration for the X.21 Link ......................................................................................77
Configuration of X.21 Link Parameters ..................................................................................77
Install the X.21 Link..................................................................................................................80
X.21 Feeder Mux Node IDs ......................................................................................................80
X.21 Channels ...........................................................................................................................80
X.21 Calls ...................................................................................................................................80
8.8 Review Link Configuration...............................................................................................81
9. Data-Channel Configuration
9.1 Port Configuration............................................................................................................82
9.2 Synchronous Channels .....................................................................................................83
Protocol Menu...........................................................................................................................83
Sync Channel Parameters .........................................................................................................83
Control Signals ..........................................................................................................................85
9.3 Asynchronous Channels ...................................................................................................93
Async Channel Menu ................................................................................................................93
Channel Characteristics ............................................................................................................94
Channel Features ......................................................................................................................98
Extended Features...................................................................................................................101
9.4 Copy Channel Parameters..............................................................................................102
9.5 Review Data-Channel Configuration .............................................................................103
Reviewing Sync-Channel Configuration ................................................................................103
Reviewing Async-Channel Configuration ..............................................................................104
9.6 Connecting Data Channel Cables..................................................................................105
10. Switching Configuration
10.1 Switching Control .........................................................................................................106
10.2 Point-to-Point Dedicated (Force Connect All) ...........................................................109
10.3 Force-Connecting a Range ...........................................................................................110
Example of Force-Connecting a Range .................................................................................111
10.4 Synchronous Connections............................................................................................111
10.5 Asynchronous Connections..........................................................................................112
Async Force-Connections........................................................................................................112

Multiserver 5000
8
Fixed Destination Connection ...............................................................................................112
Class Connections ...................................................................................................................112
Node/Class Connection .........................................................................................................113
Matrix Connection ..................................................................................................................113
10.6 Matching Capability for Asynchronous Channels.......................................................114
10.7 Asynchronous-Channel Switching Parameters............................................................115
10.8 Classes ............................................................................................................................118
What is a Switching Class?.......................................................................................................118
Example of a Switching Class .................................................................................................120
Planning a Class.......................................................................................................................120
Configuring a Class .................................................................................................................120
Review Class Configuration ....................................................................................................123
Review Class Messages.............................................................................................................123
10.9 Connect Protocol Details..............................................................................................124
Dedicated Protocol..................................................................................................................124
DTR Protocol...........................................................................................................................124
Auto (Answer) Protocol..........................................................................................................126
10.10 Port Contention/Queueing .......................................................................................126
10.11 X.21 Switching Considerations ..................................................................................127
10.12 Review Switching Configuration for an Async Channel ...........................................129
11. Administration
11.1 Reset...............................................................................................................................130
Keypad Reset............................................................................................................................130
Command Facility Reset .........................................................................................................131
11.2 The Command Mode ...................................................................................................133
Entering the Command Mode .............................................................................................................133
Exiting the Command Mode..................................................................................................133
11.3 Configuring the Command Facility .............................................................................135
11.4 Messages ........................................................................................................................140
Alarm Messages .......................................................................................................................140
Event Messages ........................................................................................................................140
Class Messages .........................................................................................................................140
Broadcast Messages .................................................................................................................140
Table of Contents (continued)

Table of Contents
9
Dialog Messages.......................................................................................................................141
11.5 Network Security ...........................................................................................................144
Passwords .................................................................................................................................141
Lock-Out Configuration .........................................................................................................147
11.6 Status/Statistics .............................................................................................................148
11.7 Link Administration......................................................................................................154
Reset.........................................................................................................................................154
Status/Statistics........................................................................................................................154
Channel Priority Over the Link..............................................................................................154
11.8 Channel Administration...............................................................................................154
11.9 Switching Administration .............................................................................................155
12. Diagnostics
12.1 Self-Test..........................................................................................................................157
12.2 Terminate Test...............................................................................................................157
12.3 Async Channel Loopback in the Command Mode.....................................................157
Local Echo ...............................................................................................................................157
Remote Echo ...........................................................................................................................157
Local Fox .................................................................................................................................158
Remote Fox..............................................................................................................................158
12.4 System Diagnostics in the Command Facility..............................................................159
Remote Composite Loopback ................................................................................................159
Link Channel Loopback .........................................................................................................159
Async Channel Output............................................................................................................160
Sync Channel Loopback .........................................................................................................161
Voice/Fax Tests.......................................................................................................................162
Integral Device Tests ...............................................................................................................162
LED Test ..................................................................................................................................162
Memory Dump ........................................................................................................................162
12.5 Testing the Network......................................................................................................163
Table of Contents (continued)

Multiserver 5000
10
13. LCD/Keypad
13.1 General LCD/Keypad Information .............................................................................165
LCD Blinking Backlight ..........................................................................................................166
Keypad Reset............................................................................................................................166
LCD/Keypad Password Protection.........................................................................................166
Timeouts ..................................................................................................................................166
Channel Numbers ...................................................................................................................166
13.2 Banner Message Display ...............................................................................................168
Configuring the Banner Message...........................................................................................168
The Banner Message Menu ....................................................................................................169
13.3 Review System Message Log .........................................................................................169
13.4 Menu Functions ............................................................................................................169
13.5 Administration ..............................................................................................................169
System ......................................................................................................................................169
Voice/Fax ................................................................................................................................169
Busy Mode................................................................................................................................170
Local Node ID .........................................................................................................................170
13.6 Diagnostics.....................................................................................................................171
System ......................................................................................................................................171
Voice/Fax ................................................................................................................................172
Integral Devices .......................................................................................................................174
13.7 Configuration................................................................................................................174
Appendix A: Worksheets
Worksheet for Planning Node Numbers and Node IDs ......................................................176
Worksheet for Recording Optional Module Locations and their Connectors ..................177
Synchronous Protocol and Channel Worksheet .................................................................178
Asynchronous Channel Characteristics Worksheet ............................................................180
Asynchronous Channel Features Worksheet .......................................................................182
Asynchronous Channel Extended Features Worksheet .....................................................184
Record of Asynchronous Classes ..........................................................................................185
Switching Parameters Worksheet ..........................................................................................186
Command Facility Paraments Worksheet ............................................................................187
Table of Contents (continued)

Table of Contents
11
Display Messages Worksheet..................................................................................................188
Voice/Fax Parameters Worksheet.........................................................................................189
Record of Passwords ..............................................................................................................190
Appendix B: Cabling Diagrams
Cabling for the CCM and 6-Channel CEMs .........................................................................192
Cabling for the 12-Channel CEM ........................................................................................198
Cabling for the 12-Channel CEM with Line Drivers............................................................202
Cabling for the MS1 56K CSU/DSU Module.......................................................................204
Cabling for the NMS Module................................................................................................205
Cabling for Converters ..........................................................................................................206
Cabling for use with Tandem ................................................................................................210
Appendix C: Defaults
System Administration...........................................................................................................211
Multiserver and Feeder Mux Default Node Numbers and IDs ............................................211
Port Configuration ..................................................................................................................211
Command Facility Parameters................................................................................................212
Dialog Messages.......................................................................................................................212
Asynchronous Channel Configuration.................................................................................213
Channel Characteristics ..........................................................................................................213
Channel Features ....................................................................................................................213
Extended Features...................................................................................................................213
Switching Parameters..............................................................................................................213
Synchronous Channel Characteristics..................................................................................214
Channel Characteristics ..........................................................................................................214
DLC ..........................................................................................................................................214
ASCII Bisync and EBCDIC Bisync ..........................................................................................214
RTS/CTS .................................................................................................................................215
Sync-Pad ...................................................................................................................................215
H-P Sync...................................................................................................................................216
MICOM DLC ...........................................................................................................................216
MICOM Voice..........................................................................................................................216
TDM .........................................................................................................................................217
Table of Contents (continued)

Multiserver 5000
12
Fast Packet ...............................................................................................................................217
Voice/Fax Module .................................................................................................................218
KTS Interface...........................................................................................................................218
E&M Interface .........................................................................................................................218
OPX Interface..........................................................................................................................218
Voice/Fax Node Parameters ..................................................................................................219
Voice/Fax Switching Parameters ...........................................................................................219
NMS Module ..........................................................................................................................220
Command Port ........................................................................................................................220
Log (Printer) Port ...................................................................................................................220
Appendix D: Messages
Screen Display Messages........................................................................................................221
LCD Messages.........................................................................................................................234
Appendix E: Indicators
CCM Indicators ......................................................................................................................239
CEM Indicators ......................................................................................................................241
Voice/Fax Indicators .............................................................................................................242
CSU/DSU Indicators .............................................................................................................244
Appendix F: Device Applications
Extended Wang Support Feature (WANGX).......................................................................245
Tandem...................................................................................................................................245
HP ENQ/ACK........................................................................................................................245
Tail-Ending Mode (Dial-Up Modem Operation).................................................................246
Appendix G: Rackmount Installation .........................................................................................247
Appendix H: Additional Information.........................................................................................249
Glossary .............................................................................................................................................252
Table of Contents (continued)

CHAPTER 1: Specifications
13
Multiserver 5000 (Base Unit)
MX219A
Performance Specifications
Multiplexor Technique — Fast Packet Multiplexing
Capacity —
Data Channels: up to 5 (Ports A2 to A6)
Feeder Mux Links: up to 5 (Ports A1 to A5)
Interconnect Links: up to 3 (Ports A1 to A3)
Speed —
Data Channel: see Async Channel
Characteristics and Sync Channel
Characteristics.
Feeder Mux Link: up to 19.2 Kbps
Interconnect Link: up to 72 Kbps
Data Format —
Data Channel: sync or async
Feeder Mux Link: Sync, internal/external
clocking, full-duplex
Interconnect Link: Sync, internal/external
clocking, full-duplex
Flow Control — CTS/DTR and X-ON/X-OFF
(configurable per channel end); HP ENQ/ACK,
Tandem, WANG (configurable by channel)
Diagnostics —
Data Channel: Local/remote channel
loopback, local/remote channel output, local
sync channel loopback
Feeder Mux Link: Local and remote composite
loopback, local system loopback
Interconnect Link: Local and remote composite
loopback, local system loopback
Command Facility — Menu driven. Provides
message broadcast, dynamic channel
configuration, centralized troubleshooting,
alarm messages, and periodic reports.
Status Displays — System status and port activity
indicator lights, 80-character LCD on the front
panel.
Physical Specifications
Expansion — up to 4 modules (in locations B, C, D,
and E) and the NMS module (underneath the
CCM).
Keypad — 5 button
Indicators — 80-character front-panel LCD and
Communications Control Module LEDs:
AT - Power On
BO - Buffer Overflow
A1 to A6 - Port Activity
Interface — RS-232, V.24/V.28, DCE
Connectors — (6) DB25 (female)
Power — 90-265 Vac, 3 to 1.5 amps, 47 to 63 Hz,
135 watts maximum
Distance to power source — Do not exceed 6 feet
(1.8 m); do not use extension cords
Size — 6.5"H x 17.5"W x 12.5"D
(16.5 x 44.5 x 31.8 cm)
Weight — 22 lb. (10 kg)
Temperature —
Operating: 32° to 114°F (0° to 45°C);
Storage: -40° to +158°F (-40° to +70°C)
Humidity —
Operating: 10% to 90% relative humidity
(noncondensing);
Storage: 0 to 95% relative humidity
(noncondensing)
Lithium Battery — Located on the base module,
the battery supplies power to CMOS RAM for an
accumulated power down life of eight years.
Usable life of the battery is ten years (not
rechargeable)
Agency Compliance —
FCC: Part 15, Class A; Part 68 (voice, modem, ISU)
UL: 1950 CSA Standard C22.2 NO. 950 M-89
BABT
FTZ 1046 Level B
EN60950/VDE 0805
1. Specifications

Multiserver 5000
14
Async Channel Characteristics
Capacity — up to 41
Speed — 50 to 38,400 bps
Configuration — DCE
ABR — to 19.2 Kbps
Parity — Odd, Even, Mark, Space, None
Stop Bits — 1, 1.5, 2
Characters — 5 to 8 bits/character plus parity (code
levels 5 through 9)
Burst Rate — 422 Kbps (half-duplex over 56 Kbps
composite)
Error Control — Full-duplex, automatic request for
repetition (ARQ), with Cyclic Redundancy
Check (CRC), and selective reject. Proprietary
algorithm.
Classes — 64
Delay Characteristics — Average delay through the
Multiserver is two character times, plus the
transmission delay through the Multiserver
system. Although transmission delay is normally
very low, terminal users operating with an
echoplex system will experience this delay twice;
that is, once inbound to the computer and once
on echo outbound to the terminal. This delay is
not normally noticeable with speeds of 1200 bps
and above, but may be noticeable with speeds of
300 bps or less.
Sync Channel Characteristics
Capacity — up to 10
Speed —
External clocking: 1.2 to 38.4 Kbps
Internal clocking:
DLC: 1.2 to 38.4 Kbps;
ASCII Bisync: 1.2 to 38.4 Kbps;
H-P Sync: 1.2 to 38.4 Kbps;
RTS/CTS: 1.2 to 38.4 Kbps;
Sync-Pad: 1.2 to 38.4 Kbps;
EBCDIC Bisync: 1.2 to 38.4 Kbps;
Micom DLC 1.2 to 19.2 Kbps;
Micom Voice: 9.6 to 14.4 Kbps;
Fast Packet: 1.2 to 56 Kbps;
TDM: 1.2 to 48 Kbps.
Configuration — DCE
Protocols — DLC, ASCII Bisync, EBCDIC Bisync, H-
P Sync, RTS/CTS, Sync-Pad, MICOM DLC,
MICOM Voice, Fast Packet, and TDM
Multiserver 5000 (continued)

CHAPTER 1: Specifications
15
Expansion Modules
MS5 Expansion Module Sync/Async
MX215C
Connectors — (6) DB25 (female)
Interface — RS-232, V.24/V.28
Transmission Mode — Serial async; full-duplex
Configuration — DCE
Speed —
Async: 50 to 38,400 bps
Sync: Protocol Dependent
(see Sync Channel Characteristics)
MS1 Expansion Module—Async Only
MX222C
Connectors — (6) DB25 (female)
Interface — RS-232, V.24/V.28
Transmission Mode — Serial async; full-duplex
Configuration — DCE
Speed — 50 to 38,400 bps
MS1 Expansion Module—12 Async—RJ-45
MX223C
Connectors — (12) RJ-45 (female)
Interface — RS-232, V.24/V.28
Transmission Mode — Serial async; full-duplex
Configuration — DCE
Speed — 50 to 38,400 bps
MS1 Expansion Module—12 Async—
RJ-45 w/Line Drivers
MX224C
Connectors — (12) RJ-45 (female)
Interface — RS-422; RS-423
Transmission Mode — Serial async; full-duplex
Configuration — DCE
Speed — 50 to 38,400 bps

Multiserver 5000
16
MS1 Voice/Fax Cards
MX225C-1 AND MX225C-2
General Specifications
Channels per Voice/Fax Card —
MX225C-1: One channel
MX225C-2: Two channels
Signals Supported — Analog voice and Group III
fascimile (fax)
Telephone Interfaces —
PBX tie trunk: E&M Types I through V,
2-wire or 4-wire;
PBX station or Central Office PSTN: OPX
Loop Start, 2-wire;
Key telephone systems, telephone set or PBX
CO Trunk: KTS Loop Start, 2-wire;
Compatible Connections: OPX to KTS;
E&M to E&M; E&M to KTS; KTS to KTS (ring-
down)
Interface Connectors — RJ-11 modular jack for
KTS- and OPX-type interfaces; 8-pin terminal
block for KTS, OPX, and E&M type interfaces
Indicators per Channel —
OK - OK
LO - Local Off-Hook
RO - Remote Off-Hook
LS - Local Speech
RS - Remote Speech
TM - Test
Diagnostics — Self-Test, Loopback, and Input Level
Display
Analog Specifications
Insertion Loss — 2 dB nominal @ 1000 Hz (End-to-
End)
Audio Levels —
Input/Output Levels: 0 dBm maximum
Adjustable Range: +28 dB to –28 dB in steps of
1 dB
Frequency Response — 300 Hz to 3000 Hz @ +1.5
dB/-2 dB
Idle Channel Noise — ≤22 dBrnC
Non-Linear Distortion — Second Harmonic ≥40 dB
below Signal; (4 tone method): Third Harmonic
≥40 dB below Signal
Signal to Noise Ratio — ≥37 dB
Input Impedances —
E&M 4-wire, E&M 2-wire, KTS 2-wire: 600 Ω,
±10 percent, balanced
OPX 2-wire: 600 Ωnominal
Return Loss —
Echo Return Loss: ≥20 dB
Singing Return Loss:
Low: ≥14 dB
High: ≥14 dB
Longitudinal Balance —
200 to 1000 Hz: ≥58 dB
1000 to 3000 Hz: ≥53 dB
Echo Canceling — ≤4 milliseconds (≤150 miles)
Echo Suppression — ≥35 dB
Crosstalk (near/far end) —
E&M 4 wire: ≥75 dB transmit to receive;
between channels: ≥75 dB

CHAPTER 1: Specifications
17
Signaling Specifications
Formats —
Dial Pulse: ≤3% distortion @ 10 pulses per
second
Dual Tone Multifreq: ≤1% distortion
Steady DC (E&M): Types I, II, III, IV, and V
Single Frequency: 2280 Hz (AC15) on E&M 4
wire interface only
Pulsed DC (RonTron): E&M interface only
NOTE: Both ends must use the same signaling
format
KTS Interface —
Loop Range: 400 Ω(2000 feet on 24 AWG wire
pair)
Ringing Source: 25 or 50 Hz ±2 Hz, 40 Vrms
into 2 ringers
Ring Cadence: Repeated ring (matches ringing
cadence from remote voice/fax channel),
interrupted ring 2/4 (2 seconds on, 4 seconds
off), or interrupted ring 2 1/2 (ring two times
for 0.4 second separated by .02 second, and
then be off for two seconds)
OPX Interface —
Loop Range: 900 Ω(6500 feet on 24 AWG wire
pair)
Ringing Detection: 19 to 33 Hz at
40 to 90 Vrms
E&M Interface —
Loop Range: 400 Ω(2000 feet on 24 AWG wire
pair)
Digital Specifications
Channel Digitizing Rates — 4.8, 6.4, 7.2, 8, 9.6, 12,
14, and 16 Kbps
Fascimile Rates — Group III fax at 9.6, 7.2, 4.8, and
2.4 Kbps, not to exceed channel digitizing rate
Link Error Rate —
Circuit Degradation @ ≤1 bit in 100,000
Circuit Unacceptable @ ≤1 bit in 10,000
Mean One-Way Propagation Time —
≤180 ms for voice (excluding link propagation)
≤253 ms for fax (excluding link propagation)
MS1 Voice/Fax Cards (continued)
MX225C-1 AND MX225C-2

Multiserver 5000
18
MS1 56K CSU/DSU Module
MT150C
Network Application — 4-wire DDS interface to
AT&T Digital Data Service network (or
equivalent)
Data Rate — 56 Kbps
Connectors — RJ-48S (USOC) 8-pin modular jack
Transmission Mode — Synchronous; full-duplex
Loop Range — 15,000 feet (4572 m) over 26 AWG
wire
Output Signal — Pulse amplitude 1.4 to 2.1 V (135-
ohm load)
Operating Modes — Data, Idle, Out-of-Service, Test
Timing — Network-derived (internal crystal)
Clocking — Internal/External
Diagnostics — Local Loopback, Digital Loopback,
End-to-End Test Pattern, Self-Test, Telco CSU
and DSU tests
Indicators —
LL - Local Loop
RT - Remote Test
SI - Signal Indicator
RD - Receive Data
TD - Transmit Data
Certifications — FCC Part 68; FCC 15, Subpart J,
Class A; UL®and CSA
MS RLB Module
MX229A
Connectors — 15-pin AUI connector or BNC
connector
Indicators — Bridge LEDs:
AT - Power On
LA - LAN Activity
BA - Bridge Activity
IB - Input Buffer
OB - Output Buffer
Protocols Supported — All LAN protocols,
including use of oversize packets in Novell
NetWare.
Data Compression — All LAN data compressed up
to 6:1. TCP/IP and LAT headers compressed
up to 10:1.
Filters — Automatic filtering on destination
address. Optional filters include broadcast,
multicast, source address, protocol type, and
pattern match.
Spanning Tree — IEEE 802.1D compliant.
Compatible with all 802.1D compliant bridges.
Filtering Performance — 10,000 packets per second
(64-byte packets) maximum.
Forwarding Performance — 300 packets per seond
maximum.
Management Interface — Command Facility of the
local or remote Multiserver Bridge 1000. From
LAN via LAT or TELNET connection. SNMP
agent with public domain MIB II (monitor
only).

CHAPTER 1: Specifications
19
MS1 NMS Module
MX227C
Command and Printer Ports:
Connector — DB25 (female)
Interface — RS-232/V.24/V.28
Transmission Mode — Serial async
Data Rates — Up to 19.2 Kbps
Alarm Relay Connector — 4-position terminal block
MS1 V.35 Converter/DCE
MX226
Converter — RS-232 to V.35
Connectors —
To Central Control Module: DB25 (male)
To V.35 Connector: DB25 (female)
Cable (included) — 5-foot DB25 (male) to
34-pin M-block (male)
X.21 Converter/DCE
MX228C
Converter — RS-232 to X.21
Connectors —
To Central Control Module: DB25 (male)
To X.21 Connector: DB15 (male)
Cable (not included) — 5-foot DB15 (female) to
DB15 (male) (EVNX21-003M-MF)