Black Box SW546A User manual

CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
OCTOBER 1996
SW545A
SW546A
Port Manager Switches
Port Manager Switch
ON RDY
ACTIVITY
12345678
Port Manager Switch
ON RDY
ACTIVITY
12345678
ACTIVITY
12345678

FCC AND IC STATEMENTS, TRADEMARKS
3
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio frequency
energy and if not installed and 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
necessary 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
classe A prescrites dans le Règlement sur le brouillage radioélectrique
publié par Industrie Canada.
TRADEMARKS USED IN THIS MANUAL
AT and IBM are registered trademarks, and PC/XT is a trademark,
of IBM Corporation.
ProComm is a registered trademark of Symantec Corporation.

PORT MANAGER SWITCHES
NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes
de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo,
cerca de la tina de baño, lavabo, sótano mojado o cerca de una alberca,
etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales
que sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como
sea recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más
allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama,
sofá, alfombra o superficie similar puede bloquea la ventilación, no se
debe colocar en libreros o gabinetes que impidan el flujo de aire por los
orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de
calor como radiadores, registros de calor, estufas u otros aparatos
(incluyendo amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo
del tipo descrito en el instructivo de operación, o como se indique en el
aparato.
4

NOM STATEMENT
12. Precaución debe ser tomada de tal manera que la tierra fisica y la
polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen
del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las
lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no
sea usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del
aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en
su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
5

PORT MANAGER SWITCHES
Contents
Chapter Page
1. Specifications ............................................................................................. 7
2. Introduction ............................................................................................. 11
2.1 General Overview .............................................................................. 11
2.2 The Port Manager Switches Illustrated ........................................... 13
3. Getting Started ......................................................................................... 15
3.1 Setting Default Communication Parameters .................................. 15
3.2 Connecting Your PC to the PM Switch ............................................ 16
3.3 Applying Power to the PM Switch .................................................... 17
3.4 Communicating with the PM Switch Unit ....................................... 18
4. Installation ................................................................................................ 22
4.1 Setting the SETUP Switch ................................................................ 22
4.2 Connecting a Modem to the PM Switch .......................................... 25
4.3 Initializing the Unit to Default Settings .......................................... 26
4.4 Connecting Devices to the PM Switch ............................................. 26
5. Configuration ........................................................................................... 28
5.1 Accessing the PM Switch’s Command Mode .................................. 28
5.2 Defining and Reading the Site I.D. ................................................... 29
5.3 Port Configuration ............................................................................ 30
6. Operation ................................................................................................. 36
6.1 Connecting and Disconnecting Ports .............................................. 36
6.2 Defining Hunt Groups ..................................................................... 39
6.3 Port Buffers ....................................................................................... 41
6

7
TABLE OF CONTENTS
Chapter Page
7. Saving Configuration Parameters ............................................................ 42
7.1 Sending Parameters to a File ............................................................ 42
7.2 Restoring Saved Parameters ............................................................. 43
8. Command Reference Guide ................................................................... 44
8.1 Command Conventions .................................................................... 44
8.2 Command Response ......................................................................... 45
8.3 Command Summary ......................................................................... 46
8.4 Command Set .................................................................................... 47
9. Troubleshooting ...................................................................................... 56
9.1 Calling Black Box .............................................................................. 56
9.2 Shipping and Packaging ................................................................... 56
Appendix A: Pinouts .........................................................................................57
Appendix B: SW546A-D48 ................................................................................62

8
PORT MANAGER SWITCHES
Compliance — FCC Class A, IC Class/classe A
Interfaces — Proprietary modular serial, compatible with EIA
RS-232 (DTE)
Protocol — Asynchronous
Code Set — ASCII
Data Format — Either 8 data bits, no parity, or 7 data bits, even or
odd parity; either 1 or 2 stop bits (independently
user-selectable for each port)
Flow Control — DTR/CTS (hardware), X-ON/X-OFF (software), or
both (independently user-selectable for each port)
Operation — Full duplex (command echo) or half-duplex (no echo),
user-selectable
Data Rate — 38,400, 19,200, 9600, 4800, 2400, 1200, or 300 bps
(independently user-selectable for each port)
Maximum
Distance — Up to 150 ft. (45.7 m); might be less if you use flat-
Internal Memory — 256 KB battery-backed, autoconfiguring, dynamically
allocated buffer SRAM on SIMMs (or DIPs in some
units); units with 512 KB are available as special
quotes
1. Specifications

9
CHAPTER 1: Specifications
User Controls — Keyboard commands;
(2) Front-mounted CLEAR and SET pushbuttons;
(3) Rear-mounted:
(1) 8-position DIP switch for comm. parameters;
(1) 115-/220-VAC slide switch;
(1) OFF/ON rocker switch
Indicators — All front-mounted:
Both models: ON and RDY (ready) LEDs;
SW545 models: (8) ACTIVITY LEDs;
SW546 models: (16) ACTIVITY LEDs
Connectors — All rear-mounted:
All models: (1) IEC 320 male power inlet;
SW545 models: (8) RJ-11 female;
SW546 models: (16) RJ-11 female
Leads/Signals
Supported — Ports 1 and 2:
Pins 1 through 6 (CTS in, SGND, RD in, RLSD
[DCD] in, TD out, and DTR out respectively);
Ports 3 and up:
Pins 1 through 6 (CTS in, SGND, RD in, RTS [held
high], TD out, and DTR out respectively)
Power — From outlet through 6-ft. (1.8-m) power cord
(included with SW545 units only) and internal
power supply:
Either 115 VAC, 60 Hz or 220 VAC, 50 Hz (user-
selectable);
Consumption: 5 watts
Fuse — 250 volts, 125 mA Slo-Blo
Temperature
Tolerance — 32 to 122˚ F (0 to 50˚ C)

10
PORT MANAGER SWITCHES
Humidity
Tolerance — 20 to 80% noncondensing
Size — 1.8" (1U) H x 17"W x 6.5"D (4.4 x 43.2 x 16.5 cm);
when rackmount brackets are added, the unit is
19" (48.3 cm) wide
Weight — 6 lb. (2.7 kg)

11
CHAPTER 2: Introduction
2.1 General Overview
With our 8-port and 16-port Port Manager (PM) Switches, you can control
and manage a network without having to worry about the in-band restrictions
associated with SNMP. Both models of the Switch make it possible to establish
on-site or remote communication with any piece of equipment that has an RS-
232 command port. You can access such devices without having to travel to
the installation site, even when your network is down.
Versatile Connectivity
The PM Switch provides a practical solution for applications that require
communicating with devices using dissimilar data rates. You can individually
tailor the Switch’s 8 or 16 ports for specific data rates, data formats, types of
flow control, and various other custom parameters and options.
Easy Setup and Operation
Configuring the PM Switch is simple. You can select communications
parameters or enable or disable options through a convenient menu system.
The Switch can be easily configured to fit the requirements of almost any
data-communications application.
Limited Command Access
The PM Switch is ideal for situations that require two tiers of command/
configuration security. You can individually configure the Switch’s ports
either as Administrator ports with access to all commands, or as User ports
with access to basic commands only.
Modular Design
The PM Switch’s RJ-11 jacks can be quickly and easily connected (through
RS-232 modular adapters) to computers, modems, and other LAN/WAN
hardware. The Switch is compact and occupies only one rack unit (1.75
inches) of vertical rack space.
Buffered Ports
The PM Switch has 256 KB of nonvolatile, dynamically allocated buffer
memory that prevents data from overflowing during communication sessions.
If your application requires more memory, call Black Box for technical
support; they might be able to provide you with a quote on units with 512-KB
buffers.
2. Introduction

12
PORT MANAGER SWITCHES
Modem Communication
You can control the PM Switch either from a local PC directly cabled to it or
from a remote PC across a modem link. Use ProComm®(or another
communications program) to send commands to ports and to receive and
display status information from them. All devices connected to the Switch’s
ports would have outbound access to the outside world through any
connected modem, but the Switch’s modem ports are password-protected to
restrict unauthorized inbound access to other devices connected to the
Switch.
Configuration Backup
Once you have configured the PM Switch to fit the requirements of your
application, you can save your chosen parameters and options in the form of
an ASCII text file for future retrieval. If the Switch’s configuration is
accidentally altered or deleted, you can use your terminal-emulation software
to reload this configuration file into the unit.

13
CHAPTER 2: Introduction
2.2 The Port Manager Switches Illustrated
2.2.1 T HE F RONT P ANELS
The front panels of the Port Manager Switches are very similar to each other.
The front panel of the 16-port unit is shown in Figure 2-1 below; it includes
several controls and indicators, whose functions are described beneath the
illustration. The front panel of the 8-port unit does not have ACTIVITY LEDs
9 through 16.
Figure 2-1. The front panel of the 16-port PM Switch.
➀CLEAR Button: Press this to restart the PM Switch’s operating program
without changing the parameter settings you’ve chosen or breaking
existing port connections.
➁ON LED: Lights when the unit is receiving AC power.
➂SET Button: Press this button to initialize the PM Switch to the default
values corresponding to the current settings of its SETUP Switch (see
Section 3.1). To initialize the PM Switch, press and hold both the SET
button and the CLEAR button, release only the CLEAR button, and then
release the SET button.
NOTE
Be aware that when you initialize the PM Switch, all command-selected
parameters will be cleared, and the PM Switch will revert to its default
parameters. This might cause existing connections to fail and prevent
new connections until you issue commands to change parameters on
certain ports.
➃RDY LED: Flashes to show that the unit is operational.
➄ACTIVITY LEDs: Light to show that the corresponding port is receiving
data.

14
PORT MANAGER SWITCHES
2.2.2 T HE R EAR P ANELS
The rear panels of the Port Manager Switches are also similar. The rear panel
of the 16-port unit is shown in Figure 2-2 below; it includes several controls
and connectors whose functions are described beneath the illustration. The
rear panel of the 8-port unit does not have RS-232 ports 9 through 16.
Figure 2-2. The rear panel of the 16-port PM Switch.
➀RS-232 Ports: Plug six-wire flat-satin or twisted-pair cable from the
devices you want to control into these RJ-11 jacks.
Use Port 1 to communicate with the PM Switch during setup and
configuration. When the PM Switch is initialized to its default state, Port
1 is the only port with access to all PM Switch commands.
You can connect Port 1 to either a PC or modem. (After initial setup,
this is also true for Port 2.) When a modem is connected to the PM
Switch, you can control the Switch from a remote PC.
➁SETUP Switch: Use this 8-position DIP switch to set the PM Switch’s
default data rate, flow-control type, message type, port mode, and duplex
type. See Section 3.1.1.
➂Fuse: If this should happen to blow for whatever reason, replace it with a
250-volt, 1/8-amp Slo-Blo fuse only.
➃AC Switch: Slide this switch to the left to select 115-VAC input power.
Slide it to the right to select 220-VAC input power.
➄ON/OFF Switch: Move to the ON position to turn the PM Switch ON.
Move it to OFF to turn the PM Switch OFF.
➅LINE Connector: Plug the included AC power cord into this universal
IEC 320 male inlet.

15
CHAPTER 3: Getting Started
This chapter provides a brief overview of the Port Manager Switch’s basic
capabilities, and describes tests that you can perform to determine whether
the unit is operating properly.
3.1 Setting Default Communication Parameters
3.1.1 U SING F ACTORY -D EFAULT P ARAMETERS
Use the SETUP DIP switch on the rear panel of the PM Switch to select
default settings for all of the PM Switch’s RS-232 ports. (A label next to the
SETUP switch summarizes its functions.)
When the PM Switch is shipped from the factory, all eight positions of the
SETUP switch are set to down. This collective setting corresponds to these
parameters: 9600 bps, 8 data bits, no parity, DTR/CTS flow control, verbose
command response, and no echo (half-duplex). These parameters should suit
most applications; if you need different settings for your application, see
Section 3.1.2.
Now turn ON the PC you will be using to control the PM Switch. Run its
communications program (ProComm, for example), and set the program to
use parameters matching those of the PM Switch (9600 bps, 8 data bits, no
parity, DTR/CTS flow control, and full duplex in the factory-default
configuration).
If you’ll be connecting the PC and the PM Switch across a modem link,
make sure the modem is set for the data rate and other communication
parameters you are using.
3.1.2 S ETTING N EW D EFAULT P ARAMETERS
If you want to, you can set the PM Switch to use default parameters that match
those of your communications program or device instead of vice versa. To do
this, refer to the label on the bottom of the PM Switch that shows the possible
settings of the SETUP switch, and set the SETUP switch for your desired
parameters (see Section 4.1). After moving the SETUP switch, initialize
(reset) the PM Switch: Press and hold the SET and CLEAR keys, release
CLEAR, then release SET. (Your changes will not take effect until you
initialize the Switch.) All of the PM Switch’s Activity LEDs will flash briefly,
then the unit will return to normal operation.
3. Getting Started

16
PORT MANAGER SWITCHES
3.2 Connecting Your PC to the PM Switch
In order to initially configure the PM Switch, you must connect a PC to
Port 1. Port 1 is always used for communication during initial setup, because
Port 1 is the only PM Switch port through which you can access all commands
(including Administrator commands) when the unit has been initialized to
the default state.
(Note that after the unit has been installed and configured, you can give
other PM Switch ports access to all PM Switch commands. This allows any PM
Switch port to function as a “Control Port” after initial configuration is
complete.)
You can control the PM Switch either by using a local PC that
communicates with the unit across a single cable, as descibed in
Section 3.2.1, or by using a remote PC that communicates with the unit across
a modem link, as described in Section 3.2.2.
NOTE
You can use one of the three modular adapters included with the
PM Switch for this purpose if you want to. Two are PC-type adapters:
One has a DB9 female connector, pinnned to interface with an IBM®AT®
or compatible computer; the other has a DB25 female connector,
pinnned to interface with an IBM®PC/XT™ or compatible computer. The
third adapter has a DB25 male connector and is pinned to interface with
a standard modem. See Appendix A for a description of the adapter
pinouts, end-to-end pinning, and the product codes of the relevant
adapter kits if you want to build your own adapters. If you want to order
assembled adapters instead of building more, call Black Box for a
special quote.
3.2.1 D IRECT C ONNECTION
Making a direct connection is the easiest way to configure the PM Switch for
the first time. Take these steps:
1. Attach an appropriate modular adapter to your PC’s COM port. (Make
sure you connect the adapter to the COM port used by your
communications program.)
2. Plug one end of one of the modular flat-satin cables included with the
PM Switch into the unit’s Port 1. Plug the other end of the cable into the
adapter you just attached to your PC’s COM port. (If you want to use a
different cable to make this connection, it must be a six-wire, straight-
through-pinned twisted-pair [our product code EYN725MS] or flat-satin
[our product code EL06MS] cable with RJ-11 male connectors.)

17
CHAPTER 3: Getting Started
3. Turn ON the PC and run ProComm (or a similar communications
program). Go on to Section 3.3.
3.2.2 C ONNECTION ACROSS A M ODEM L INK
If you want to, you can perform first-time configuration across a modem link
instead of through a direct connection. Take these steps:
1. If you haven’t already done so, run a normal modem cable from the
remote PC’s COM port to the remote modem’s serial port. Make sure
you connect this cable to the COM port used by your communications
program.
2. Attach an appropriate modular adapter to your local modem’s serial
port.
3. Plug one end of one of the modular flat-satin cables included with the
PM Switch into the unit’s Port 1. Plug the other end of the cable into the
adapter you just attached to your modem’s serial port. (If you want to
use a different cable to make this connection, it must be a six-wire,
straight-through-pinned twisted-pair [our product code EYN725MS] or
flat-satin [our product code EL06MS] cable with RJ-11 male connectors.)
4. Turn ON the remote PC and run ProComm (or a similar
communications program). Go on to Section 3.3.
3.3 Applying Power to the PM Switch
Connect a power cord to the IEC 320 male inlet on the rear panel of the PM
Switch. (A power cord is included with the 115-VAC versions of the
PM Switches.) Plug the other end of the cord into a working AC outlet. Move
the PM Switch’s ON/OFF switch to ON. The PM Switch’s ON LED should
light, and its RDY LED should begin to flash.
NOTE
If all of the PM Switch’s Port Activity LEDs flash when you power up the
box, this may indicate a problem with the PM Switch unit. Please contact
Black Box for technical support as described in Section 9.1.

18
PORT MANAGER SWITCHES
3.4 Communicating with the PM Switch Unit
Take these steps to enter the PM Switch’s command mode, explore the unit’s
basic features, and check for proper operation:
1. If you have not already done so, start your communications program
(ProComm, for example).
2. Issue the “Wake Port” command to access the PM Switch Command
Mode and make certain the port is ready to receive commands. Type
“/^E [Enter]” (that is, press the [/] key, then simultaneously press the
[Ctrl] key and the [E] key, then press [Enter]). The “PM_>>” prompt
should appear.
a) If the “PM_>>” prompt is displayed, you have successfully accessed the
Command Mode. This shows the PC has contacted the PM Switch,
and the unit is operating properly.
b) If the “PM_>>” prompt is not displayed, this might indicate a problem
in communicating with the PM Switch unit. Check the following:
• Cable connection: Check the cable connection between the
PM Switch unit and the PC. Make certain the modular adapter and
the RJ-11 cable connectors are firmly seated.
• Communication parameters: Make certain the PM Switch and
ProComm (and the modems, if a modem link is involved) are
using the same communication parameters.
3. Type “/H” and press [Enter]. The PM Switch’s Help Screen will appear
as shown in Figure 3-1 on the next page. The Help Screen lists all
available PM Switch commands, along with a brief description of each
command.
4. Type “/S” and press [Enter]. The PM Switch’s Status Screen will appear
as shown in Figure 3-2 on the next page. The Status Screen summarizes
current conditions at all PM Switch ports. The various fields of the Status
Screen are described in more detail in the entry for the /S command in
Section 8.4.

19
CHAPTER 3: Getting Started
Figure 3-1. The PM Switch’s Help Screen.
/^E Wake-Up Port
/X Sleep - Only Accepts Wake-Up Command
/H Help - Displays COmmand List
/S Status - Displays Status Screen n Port # or name
/W [n] Who - Displays Port Parameters N Port #
/C <n> [n] Connect - Local [Remote] | "or"
/D <n> |...| * Disconnect * "all"
/E <n> | * Erase Buffer <> Required Entry
/I Initialize / Test Unit [] Optional Entry
/F Enter Site ID
/J Read Site ID
/P <n> Set Port Parameters
/U Read Port Parameters
/L-[n] Load Port Parameters
/G-00 Reset All Ports
/D, /E, /I Commands: Add /Y to bypass "SURE? (Y/N)"

20
PORT MANAGER SWITCHES
Figure 3-2. The PM Switch’s Status Screen.
SYSTEM STATUS VERSION 1.4 MEMORY 256KB
PORT | NAME | STATUS | BAUD | B/P | HS | MODE | TIMEOUT | BUFF | CTS
------+----------+--------+------+-----+------+--------+---------+------+----
01 | |*FREE | 9600 | 8N | DTR | ANY | OFF | ---- | H
02 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
03 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
04 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
05 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
06 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
07 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
08 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
| | | | | | | | |
09 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
10 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
11 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
12 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
13 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
14 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
15 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L
16 | | FREE | 9600 | 8N | DTR | ANY | OFF | ---- | L

21
CHAPTER 3: Getting Started
5. The PM Switch can perform two different types of port connections:
Resident Connections and Third-Party Connections.
a) Resident Connection: This type of connection occurs when your
resident port (the port that the device you’re using is attached to)
issues a /C command to connect to a second port:
i. To connect Port 1 to Port 3, type “/C 3” and press [Enter]. Note
that while Port 1 is connected to Port 3, the PM Switch will not
recognize commands received through Port 1. However, the
PM Switch will recognize a Resident Disconnect Sequence (see
below) issued at a connected port.
ii. Issue a Resident Disconnect Sequence to disconnect Port 1 from
Port 3: Type “[Enter]+++[Enter]”.
b) Third-Party Connection: This type of connection occurs when your
resident port issues a command to create a connection between two
other ports.
i. To connect Port 3 to Port 4, type “/C 3 4” and press [Enter].
ii. Note that while Ports 3 and 4 are connected, Port 1 will still
recognize PM Switch commands. For example, if you type “/S”
and press [Enter], the Status Screen will appear. Note that the
“STATUS” column now lists Ports 3 and 4 as connected, while Port
1 is listed as “FREE”.
iii. Issue a Third-Party Disconnect command to disconnect Ports 3
and 4. Type “/D 3” and press [Enter].
iv. Type “/S” and press [Enter] to re-display the Status Screen. Note
that the “STATUS” column now lists Ports 3 and 4 as “FREE”.