pathway 7321 User manual

MODEL 7321
12-Channel RJ45 Cat6
A/B/C/D Switch,
with Telnet, GUI,
and Cascade Operation
Catalog# 307321

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 1 - Pub. 5626-01
INFORMATION
WARRANTY AND LIMITATION OF LIABILITY
All equipment, software, and documentation is sold subject to the mutual agreement that it is
warranted by the company to be free from defects of material and workmanship but the
company shall not be liable for special, indirect or consequential damages of any kind under
this contract or otherwise. The company’s liability shall be limited exclusively to replacing or
repairing without charge, at its factory or elsewhere at its discretion, any material or
workmanship defects which become apparent within one year from the date on which the
equipment was shipped, and the company shall have no liability of any kind arising from the
installation and/or use of the apparatus by anyone. The buyer by the acceptance of the
equipment will assume all liability for any damages which may result from its use or misuse
by the buyer, his or its employees, or by others.
The warranties of the company do not cover, and the company makes no warranty with
respect to any defect, failure, deficiency or error which is:
Not reported to the company within the applicable warranty period; or
Due to misapplication, modification, dis-assembly, abuse, improper installation by others,
abnormal conditions of temperature, dirt, or corrosive matter; or
Due to operation, either intentional or otherwise, above rated capacities or in an otherwise
improper manner.
The company believes that the information in this manual is accurate. The document has
been carefully reviewed for technical accuracy. In the event that technical or typographic
errors exist, the company reserves the right to make changes to subsequent editions of this
document without prior notice to holders of this edition. The reader should consult the
company if errors are suspected. In no event shall the company be liable for any damages
arising out of or related to this document or the information contained in it.
There are no other warranties, expressed or implied including the implied warranties of
merchantability and fitness for a particular purpose.
COPYRIGHT
Under the copyright laws, this publication may not be reproduced or transmitted in any form,
electronic or mechanical, including photocopying, recording, storing in an information
retrieval system, or translating, in whole or in part, without the prior consent of Electro
Standards Laboratories.
September 15, 2015 Electro Standards Laboratories. All rights reserved.
Electro Standards Laboratories
36 Western Industrial Drive
Cranston, RI 02921 – USA
Tel: [phone] Fax: [phone]

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 2 - Pub. 5626-01
TABLE OF CONTENTS
INFORMATION......................................................................................1
WARRANTY AND LIMITATION OF LIABILITY....................................1
COPYRIGHT..........................................................................................1
TABLE OF CONTENTS.........................................................................2
TABLE INDEX .......................................................................................3
TABLE OF FIGURES ............................................................................3
INTRODUCTION....................................................................................5
INSTALLATION.....................................................................................7
POWER SUPPLY....................................................................................7
CASCADE PORT CONNECTIONS ..............................................................8
ETHERNET REMOTE PORT PINOUT..........................................................9
OPERATION........................................................................................10
MANUAL CONTROL..............................................................................10
REMOTE CONTROL COMMANDS............................................................12
CASCADE OPERATION .........................................................................15
Setup and Supported Models.......................................................15
Operation: Discovery....................................................................16
Operation: Cascade commands...................................................17
SWITCH POSITION ON POWER DOWN ....................................................20
REMOTE ETHERNET CONNECTIONS ..............................................21
VERIFY THE HARDWARE.......................................................................21
IF NO LAN IS AVAILABLE,USE A CROSSOVER CABLE...............................21
IF CONNECTING TO A LAN USE A 10/100BASE-TCABLE .........................21
10/100BASE-T LAN SETUP................................................................22
NETWORK SETUP................................................................................22
GETTING DEVICEINSTALLER .................................................................22
FINDING THE IP ADDRESS OF THE SWITCH.............................................22
Unreachable Status in Red ..........................................................23
STATIC/DHCP IP ADDRESS CONFIGURATION ........................................23
RESETTING THE REMOTE ETHERNET PORT............................................24
REMOTE TELNET SESSION..............................................................25
TELNET IN WINDOWS XP .....................................................................25
TELNET IN WINDOWS VISTA/7/8............................................................25

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 3 - Pub. 5626-01
TELNET IN LINUX/MAC OS X................................................................25
TELNET SESSION ................................................................................25
REMOTE CONTROL GUI....................................................................26
JAVA SECURITY POLICIES ....................................................................27
LOGGING INTO THE REMOTE CONTROL GUI...........................................29
UNIT SELECTION.................................................................................30
CHANGING SWITCH POSITION AND LOCK STATE .....................................32
QUERYING THE STATUS OF THE UNIT ....................................................33
SELECTING A CASCADED MODEL 7320 .................................................34
CASCADE DISCOVERY .........................................................................35
UNIT INFORMATION..............................................................................36
USING THE CHANNEL GANG CONTROLS ................................................37
IPCONFIGURATION AND PASSWORD MANAGEMENT................................38
DISABLING THE LOGIN PASSWORD........................................................39
ENABLING THE LOGIN PASSWORD.........................................................40
CHANGING THE LOGIN PASSWORD........................................................41
RECONFIGURING THE IP ADDRESS........................................................42
TROUBLESHOOTING.........................................................................44
SWITCHING ISSUES..............................................................................44
REMOTE CONNECTION ISSUES .............................................................44
REMOTE LOGIN ISSUES........................................................................46
CASCADE ISSUES................................................................................46
SPECIFICATIONS...............................................................................47
CUSTOMER & TECHNICAL SUPPORT .............................................48
CUSTOMER SUPPORT..........................................................................48
TECHNICAL SUPPORT ..........................................................................48
TABLE INDEX
Table 1: Complete Pinout of the Cascade In Port..................................8
Table 2: Complete Pinout of the Cascade Out Port ...............................9
Table 3: Ethernet Remote Port Pinout....................................................9
Table 4: Remote Control Commands...................................................13
TABLE OF FIGURES
Figure 1: Model 7321 Rear Panel ..........................................................7
Figure 2: Model 7321 Front Panel........................................................10
Figure 3: Crossover Cable connection for no LAN...............................21

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 4 - Pub. 5626-01
Figure 4: Connecting to a LAN with a 10/100Base-T cable..................21
Figure 5: Finding the IP address in DeviceInstaller..............................22
Figure 6: Unreachable unit shown in red in DeviceInstaller..................23
Figure 7: GUI in a Standard Web Browser...........................................26
Figure 8: Java Security Settings...........................................................27
Figure 9: Java Security Warning..........................................................28
Figure 10: Logging into the GUI...........................................................29
Figure 11: Prompt for unit selection......................................................30
Figure 12: Initial loading when a unit is selected..................................31
Figure 13: Change the switch position and lockout from the GUI.........32
Figure 14: The GUI is alerted to changes in the unit status..................33
Figure 15: A Cascaded Model 7320 selected in the GUI......................34
Figure 16: Running Cascade Discovery in the GUI..............................35
Figure 17: Remote Control Unit Information.........................................36
Figure 18: Using the Channel Gang Controls in the GUI......................37
Figure 19: Remote Control Unit Information.........................................38
Figure 20: Enter the existing password to disable authentication.........39
Figure 21: Password disabled successfully..........................................39
Figure 22: Enter a new 6-character password to enable authentication
.............................................................................................................40
Figure 23: Password enabled successfully..........................................40
Figure 24: Enter a new 6-character password to change the password
.............................................................................................................41
Figure 25: Password changed successfully. ........................................41
Figure 26: Reconfiguring the IP Address..............................................42
Figure 27: Windows Security Alert.......................................................42
Figure 28: Static IP address.................................................................43

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 5 - Pub. 5626-01
INTRODUCTION
The PathWay® Model 7321 12-Channel RJ45 Cat6 A/B/C/D Switch with
Telnet, GUI, and Cascade Operation allows the user the capability of
sharing a single port RJ45 interface device, connected to the
“COMMON” port, among four other devices, connected to the “A”, “B”,
“C”, and “D” ports, for each channel. The Model 7321 is enclosed in a
3U, full rack size, all metal black chassis designed to provide EMI/RFI
shielding and fit in a standard 19” rack.
The unit can be operated by either the front panel pushbuttons or the
10/100Base-T LAN Ethernet Remote. The unit also supports cascade
operation, where other supported units can be connected and operated
through a single remote port interface.The state of the unit can be
obtained from the front panel LED’s or through the Remote Telnet
Commands or Graphical User Interface.
Features:
•
The switch ports are transparent to all data.
•
All (8) pins of the RJ45 interface are switched via break-before-
make electromechanical relays.
•
Switch maintains last set position on power loss and continues
to pass data.
•
Individual control of each channel.
•
Front panel pushbutton control.
•
Remote Control of the switch from a 10/100-Base-T LAN
Ethernet environment.
•
Remote Control Telnet Command Interface or Graphical User
Interface that allows the user to control switch position, lockout
front panel operations, control cascaded units, as well as obtain
switch status and receive cascade unit status updates.

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 6 - Pub. 5626-01
•
Cascade operation allows control of switch position and lockout
as well as obtaining status of another unit connected to the
cascade ports through the remote Telnet Interface or Graphical
User Interface of a single unit.
•
Cascade operation is compatible with the Model 7320 (Catalog
#307320), and other Model 7321 units.
•
Front panel LED’s display present position and power status.
•
Cat6 compliance.

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 7 - Pub. 5626-01
INSTALLATION
This section describes the physical connections required to start
operating the Model 7321.
Figure 1: Model 7321 Rear Panel
The rear panel view of the switch is shown in the above figure. On the
rear of the switch are the following ports:
•
POWER – Phoenix (F), External Power Supply Input connector.
•
REMOTE – RJ45 (F), 10/100BASE-T LAN access Ethernet
Remote Control port.
•
CASCADE:
oIN – RJ45 (F), the cascade port in from previous unit.
oOUT – RJ45 (F), the cascade port out to next unit.
•
COM – RJ45 (F) connector, the “COMMON” or shared device
port, for each channel.
•
A – RJ45 (F) connector, the “A” device port, for each channel.
•
B – RJ45 (F) connector, the “B” device port, for each channel.
•
C – RJ45 (F) connector, the “C” device port, for each channel.
•
D – RJ45 (F) connector, the “D” device port, for each channel.
.
Power Supply
After all the proper connections have been made, plug the Model 7321
into a 100VAC/240VAC, 50Hz/60Hz wall receptacle using the supplied
12VDC, 500mA, UL listed and LPS approved, 2-prong US non-polarized
NEMA 1-15P plug wall mount power supply, P/N 516682.
Model 7321 Rear Panel
Power A, B, C, D, and COM ports
for all channels
Remote
Cascade In
and Out ports

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 8 - Pub. 5626-01
Option: Wide Range Power Module, (Cat. No. 517277),
100VAC/240VAC, 50Hz/60Hz, IEC 60320 C14 inlet, can be ordered for
use in place of the standard NEMA 1-15P plug power module that is
included with the unit. Ideal for international applications.
Upon power up the Model 7321 will process its power up routine. When
the routine is done the front panel LED's will indicate the present
position of the unit. At this point the unit is ready for operation.
Cascade Port Connections
These are custom RJ45 ports. There are signals present to support the
gang operation feature that are not typically found on an Ethernet, T1,
E1, or any other standard that utilizes the RJ45 interface. Please pay
close attention to the connector pin/signal list and do not use this port
for other applications.
Please note that the maximum total bus length has only been tested to
200 feet. Exceeding this length may be possible, but it has not been
verified. Please also note that there should be one Cascade In/Out port
open on the unit at one end of the bus, and there should also be one
Cascade In/Out port open on the unit at the other end of the bus—do
not connect these end points directly together with another cable to form
a loop.
Note: Do NOT use a crossover cable as this will cause the unit to
malfunction and possibly cause permanent damage to the units.
Pin Function
1 Bus Communication – RS-485 Non-inverting pin (+) [bidirectional]
2 Bus Communication – RS-485 Inverting pin (-) [bidirectional]
3 Common Reference [gnd]
4 Reserved [output]
5 Reserved [dry]
6 Bus Communication – Driver Busy [bidirectional]
7 Reserved [input]
8 Reserved [dry]
Table 1: Complete Pinout of the Cascade In Port

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 9 - Pub. 5626-01
Pin Function
1 Bus Communication – RS-485 Non-inverting pin (+)[bidirectional]
2 Bus Communication – RS-485 Inverting pin (-)[bidirectional]
3 Common Reference [gnd]
4 Reserved [dry]
5 Reserved [output]
6 Bus Communication – Driver Busy [bidirectional]
7 Reserved [dry]
8 Reserved [input]
Table 2: Complete Pinout of the Cascade Out Port
Note: Pins labeled as “[gnd]” in Table 1 and Table 2 are pins that are
internally tied together and connected to ground.
Ethernet Remote Port Pinout
SIGNAL NAME PIN #
DIRECTION
TRANSMIT DATA A (XMT-A) 1 OUTPUT
TRANSMIT DATA B (XMT-B) 2 OUTPUT
RECEIVE DATA A (RCV-A) 3 INPUT
RECEIVE DATA B (RCV-B) 6 INPUT
Table 3: Ethernet Remote Port Pinout

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 10 - Pub. 5626-01
OPERATION
The Model 7321 can be operated by the front panel, through its Remote
port, or through another unit connected to its Cascade ports.
Figure 2: Model 7321 Front Panel
Manual Control
The front panel view of the Switch System is shown in the above figure.
On the front of the switch are the following controls and indicators, for
each channel:
•
A, B, C, D Indicators – Red LED’s indicate the position of the
channel.
oThe LED in the steady state indicates the position of
the switch.
oThe LED’s will cycle through these positions while the
pushbutton is held to select a new position, showing
the potential new position.
oWhile waiting to confirm the new position, the LED for
the corresponding position will flash.
oIf the front panel control is locked for that channel and
the pushbutton is pressed, all position LED’s for that
channel will light until the pushbutton is released.
oDuring the power up routine, the LED’s will scroll
sporadically. This will continue for approximately 5
seconds (7 seconds when the Remote Ethernet Reset
has been initiated). Upon completion, the LED’s will
display the present position and be ready for
operation.
Model 7321 Front Panel
Pushbuttons and LED’s
for all channels

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 11 - Pub. 5626-01
•
Pushbutton – The position front panel pushbutton allows the
channel position to be changed.
oPressing and holding the pushbutton will cause the
LED’s to cycle through the positions.
oWhen the LED for the desired position is/are
indicated, the user should release the pushbutton.
oIn order to make the unit switch to that position, the
pushbutton must be pressed again within 2.5 seconds
in order to confirm the position selection.
oIf the pushbutton is not pressed within 2.5 seconds,
no switching will occur and the unit will return to
displaying its present position with a solid LED.
oHolding any pushbutton on power up will initiate the
Remote Ethernet Reset routine.
oPushbutton control can be inhibited if locked out
remotely.

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 12 - Pub. 5626-01
Remote Control Commands
All commands are ASCII commands, including CONTROL commands.
A CONTROL command is created by pressing and holding the [CTRL]
key and the designated character key simultaneously. For example, to
create the CTRL-A command, simply press the [CTRL] and [A] keys on
the keyboard simultaneously then release both.
Do not press the enter key at the end of a command. See Table 4 for
details. All responses are terminated with a carriage return (‘\r’)
followed by a new line feed (‘\n’).
A note to those programming their own systems to control this switch
automatically: The ASCII Control commands are represented as the
decimal equivalent of the numerical position of that letter in the
alphabet, which can then be translated to hex. For example, CTRL-A
translates to ‘1’ in decimal or 0x01 in hex, since A is the 1st letter of the
alphabet. CTRL-V, on the other hand, translates to ‘22’ in decimal, and
0x16 in hex, since it is the 22nd letter of the alphabet.
Command Parameter Function Response
CTRL-A, A, a
<ch>
01-12: Channel
00: All Channels
(must be 2-digit channel)
(must be logged in or
password disabled)
Switch to A
XXXX Channel <ch> - Position: A,
<un/locked>
or
4010 All channels switched to
position A.
CTRL-B, B, b
<ch>
01-12: Channel
00: All Channels
(must be 2-digit channel)
(must be logged in or
password disabled)
Switch to B
XXXX Channel <ch> - Position: B,
<un/locked>
or
4020 All channels switched to
position B.
CTRL-C, C, c
<ch>
01-12: Channel
00: All Channels
(must be 2-digit channel)
(must be logged in or
password disabled)
Switch to C
XXXX Channel <ch> - Position: C,
<un/locked>
or
4030 All channels switched to
position C.
CTRL-D, D, d
<ch>
01-12: Channel
00: All Channels
(must be 2-digit channel)
(must be logged in or
password disabled)
Switch to D
XXXX Channel <ch> - Position: D,
<un/locked>
or
4040 All channels switched to
position D.
CTRL-L, L, l
<ch>
01-12: Channel
00: All Channels
(must be 2-digit channel)
(must be logged in or
password disabled)
Locks front
panel
XXXX Channel <ch> - Position:
<A/B/C/D>, Locked
or
4200 All channels Locked.

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 13 - Pub. 5626-01
CTRL-U, U, u
<ch>
01-12: Channel
00: All Channels
(must be 2-digit channel)
(must be logged in or
password disabled)
Unlocks
front panel
XXXX Channel <ch> - Position:
<A/B/C/D>, Unlocked
or
4100 All channels Unlocked.
CTRL-P, P, p
<ch>
01-12: Channel
00: All Channels
(must be 2-digit channel)
(must be logged in or
password disabled)
Query for
current
status
XXXX Channel <ch> - Position:
<A/B/C/D>, <un/locked>
(for each channel if all channels)
CTRL-F, F, f N/A
(must be logged in or
password disabled)
Cascade
discovery See section “Operation: Discovery”
CTRL-G, G, g
<model>
[<serial>]
<cmd>
[<ch>]
See section “Cascade
Operation”
(must be logged in or
password disabled)
Cascade
command See section “Operation: Cascade commands”
CTRL-E, E, e
<pw>
6-character password
(must be logged out,
password enabled) Login
7120 Welcome.
Or
5040 Login failed. Invalid
password.
CTRL-X, X, x N/A
(must be logged in,
password enabled)
Logout 7130 Bye.
CTRL-W, W, w
<pw>
<pw>
New 6-character
password, then the
same password again
(must be logged in,
password enabled)
Change
password
7350 Password has been changed
successfully.
Or
5050 Confirm password does not
match. Password has not been
changed.
CTRL-T, T, t
<pw>
<pw>
New 6-character
password, then the
same password again
(password must be
disabled)
Enable
password
protection
7040 Password protection enabled
and password has been set.
Or
5080 Confirm password does not
match. Password has not been
enabled.
CTRL-Z, Z, z
<pw>
6-character password
(password must be
enabled)
Disable
password
protection
7050 Password protection has been
disabled.
Or
5070 Invalid password. Password
has not been disabled.
CTRL-M, M, m N/A Query MAC
address
9030 M7321, MAC address:
XXXXXXXXXXXX
CTRL-N, N, n N/A Query serial
number
9020 M7321, Serial Number
XXXXX
CTRL-V, V, v N/A Firmware
version
number
9010 M7321, Firmware Version x.x,
Compiled <Date>
Table 4: Remote Control Commands

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 14 - Pub. 5626-01
Errors and condition not covered in Table 4 (excluding commands
CTRL-G, CTRL-F and their related items):
•
Issuing a command not found in Table 4 will respond with the
error message: “5010 Invalid command.” and no switching will
occur.
•
If an invalid channel specifier is entered for a command
requiring it, the unit will send the error message: “5020 Invalid
channel specifier.”
•
When entering a command that requires a channel number, the
user will be prompted: “7010 Enter a 2-digit channel number, or
00 for all channels.”
•
When the CTRL-E command is sent (when logged out), the
user will be prompted: “7310 Enter login password.”
•
When the CTRL-W command is sent (when logged in), the user
will first be prompted with: “7330 Enter new 6-character
password.” Once the 6-characters have been sent, the user will
be immediately prompted to confirm: “7340 Please re-enter new
password to confirm.”
•
While logged out, sending any of the commands that require the
user to be logged in will be ignored and will receive the
message: “7110 Please Login First.”
•
While logged in, sending any of the commands that require the
user to be logged out will be ignored and will receive the
message: “7220 Command only valid when logged out.”
•
Taking longer than 60 seconds before entering a channel
specifier or another character of a password will result in one of
the following error messages depending on the exact source of
the timeout:
o“5030 Timed out entering channel specifier.”
o“5110 Timed out entering password.”
o“5120 Timed out entering new password.”
o“5130 Timed out confirming password.”
o"5150 Timed out entering new enable password.”
o"5160 Timed out confirming enable password.”
o"5170 Timed out entering disable password.”
•
The logged in session will timeout when 5 minutes have
elapsed without any input being received from the user. When
the session times out, the user will automatically be logged out
and be informed with the message: “7210 Session timeout.
Logged out.”

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 15 - Pub. 5626-01
•
When the CTRL-T command is sent (when password protection
is disabled), the user will be prompted: “7020 Enter new
password to enable password protection.” Once the 6-
characters have been sent, the user will be immediately
prompted to confirm: “7030 Please Confirm New Password
immediately.”
•
When the CTRL-Z command is sent (when password protection
is enabled), the user will be prompted: “7010 Enter current
password to disable password protection.”
•
Entering the CTRL-T command while the password is already
enabled will yield the error message: “7070 Command only
valid when password protection is disabled.”
•
Entering the CTRL-Z, CTRL-E, CTRL-W, CTRL-R, or CTRL-X
command while the password is already disabled will yield the
error message: “7060 Command only valid when password
protection is enabled.”
•
Whenever any operation takes place by pushbutton, the new
status will automatically be sent to the Remote port. When the
unit sends automatic updates, they will be in the same format
as the response for the issued command, but with “by
Pushbutton” appended. This does not apply to other cascaded
units.
Cascade Operation
Cascade operation allows the user to connect to a remote port of a
single unit and control other units individually that are connected to the
cascade ports.
Cascade operations are blocking of the remote port—no other remote
operations will be performed while cascade communications happen in
the background. If scripting commands at all, it is important to look for
these responses to confirm when operations have finished to avoid
flooding the input buffer and dropping commands.
NOTE: Cascade operation is only supported if there is only 1 unit in the
cascade whose remote port is being used at any given time. It is NOT
supported to access multiple units’ remote ports simultaneously.
Operation in the case of multiple access is NOT GUARANTEED.
Setup and Supported Models
Connecting Cascade ports requires a straight thru cable. A standard
Ethernet cable will be sufficient. It does not need to pass any Cat
rating, but it is recommended to use cables that pass at least Cat5e.
The Cascade In port of one unit must be connected to the Cascade Out
of the next.

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 16 - Pub. 5626-01
The following units currently support this cascade system, and can be
freely intermixed:
•Model 7320 (Catalog #307320)
•Model 7321 (Catalog #307321)
Operation: Discovery
Discovery is a command that can be issued to identify all units that are
part of the cascade. This will include all units physically connected
together and powered on.
Cascade discovery is done by issuing a Ctrl-F command. Immediately,
upon sending this command, the following 3 responses should be seen
that confirm receipt and proper internal operation:
•“8050 Cascade command accepted. Please wait for
confirmation...”
•“8120 Sending command to all units...”
•“8210 Command sent. Waiting for response...”
Note that if a cascade operation is already in progress, the warning
message “8510 Cascade command already pending. Please try again
later.” and the operation will be aborted.
From here, a few possible responses will be received:
•If units are found:
oFirst, the heading message “8360 Cascade units
found:” will be sent.
oThen, for each unit found, a line in the format “ xx:
Myyyy, S/N zzzzz” will be sent, where ‘xx’ is a unit
counter starting from 01; yyyy is the model number of
the discovered unit; and zzzzz is the serial number of
that same discovered unit.
oWhen discovery has timed out looking for units, the
closing message “8330 Done searching for units.
Discovery complete.” If there were parsing errors,
however, the message “8340 Done searching for
units, but there were errors. Discovery complete.” to
indicate that discovery should be run again to be sure
all units found properly.
•If units are not found:
oThe first 3 times that discovery times out without
finding any units, the response “8310 No devices
found. Retrying...” will be sent.

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 17 - Pub. 5626-01
oAfter the 3rd retry, the closing message “8320 No
devices found. Discovery complete.” will be sent.
•If there is an error parsing the response from another units at
any time, there error message “8350 Error in response from
unit. Retrying... (Exx)” will be sent.
With the results from discovery, if units were found, this data can then
be used for cascade commands.
Operation: Cascade commands
Cascade commands are issued to other units connected through the
cascade port daisy chain. Cascade commands are only valid for other
units in the cascade and not for the main unit (the unit that contains the
presently connected remote port).
Cascade commands are started with the Ctrl-G command. The full
format of this command is as follows:
Ctrl-G <model> [<serial>] <cmd> [<ch>]
where:
•<model>
oModel number of the desired unit.
o‘0000’ can be used here as a global specifier for all
units in the cascade.
•<serial>
oSerial number of the desired unit.
oSkipped if the global specifier was used for the model
number.
•<cmd>
oThe command to be sent to the cascaded units.
oValid commands are:
Ctrl-A, A, a
Ctrl-B, B, b
Ctrl-C, C, c
Ctrl-D, D, d
Ctrl-L, L, l
Ctrl-U, U, u
Ctrl-P, P, p

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 18 - Pub. 5626-01
Ctrl-M, M, m (non-global only)
Ctrl-V, V, v (non-global only)
•<ch>
oThe channel specifier, if applicable (excludes Ctrl-M
and Ctrl-V).
o01-12 is valid for Model 7321 units and global
commands.
o01-08 is valid for Model 7320 units.
o00 is valid for all, and is used for switching all
channels of the applicable unit(s).
Responses will be as follows:
•Prompt after sending Ctrl-G: “8010 Please enter the 4-digit
model number (or 0000 for all units):”
•Prompt after sending the model number:
oIf it was a global command, then it will send “8070
Global command initiated for all units. Skipping serial
number entry.” followed immediately by what would
normally follow the serial number entry: “8030 Please
enter a command for cascaded unit(s):”
oOtherwise, it will send: “8020 Please enter the 5-digit
serial number:”
•Prompt after sending the serial number (applicable only to non-
global commands): “8030 Please enter a command for
cascaded unit(s):”
•Prompt after sending the command if a channel specifier is
required: “8040 Enter a 2-digit channel number, or 00 for all
channels on unit(s):”
•Whether a channel specifier was required and entered, or was
not needed, the unit will confirm the command was valid by
sending “8050 Cascade command accepted. Please wait for
confirmation...”.
•If this was a global command, the unit will close with the
messages: “8120 Sending command to all units...”, and “8220
Command sent (no response when sent to all units).”
•If this was a non-global command:
oThe unit will initially send the messages: “8110
Sending command to Myyyy, S/N zzzzz...”, then
“8210 Command sent. Waiting for response...”

MODEL 7321 12-CHANNEL RJ45 CAT6 A/B/C/D SWITCH WITH TELNET, GUI, AND CASCADE
Electro Standards Laboratories, Inc. [phone]
www.electrostandards.com - pg 19 - Pub. 5626-01
oIf a response is received, it will be reported. All
position change, lockout change, and status queries
will receive the same response as if the non-cascade
version of those commands was issued. If it was a
Ctrl-M: “8430 Cascade unit MAC address:
xxxxxxxxxxxx”. If it was a Ctrl-V: “8410 Cascade unit
FW Version: x.x”.
oIf no response is received, then the unit will retry and
send: “8520 Cascade command failed -- no response
from unit. Retrying...”
oIf there is an error in the response, then the unit will
retry and report: “8530 Error in response from unit.
Retrying... (Exx)”
oAfter 3 retries without success, the unit will close with
the message “5850 Cascade command failed
permanently.” This can indicate a communications
failure, a bad connection, or an invalid entry if it does
not match an actual unit in the cascade.
There are some additional error messages that can be received:
•If an invalid model is entered, the unit will respond with: “5810
Invalid model number. Must be digits only.” or “5880 Invalid
model -- Only supports M7320, M7321, or Global ID.” as
appropriate.
•If an invalid serial number is entered, the unit will respond with:
“5820 Invalid serial number. Must be digits only.”
•If an invalid command is entered, the unit will respond with:
“5830 Invalid command for cascade.”
•If an invalid channel is specified, the unit will respond with
“5840 Invalid channel for cascaded unit.” or “5860 Invalid
channel for M7320 -- must be 08 or less, or 00 for all.” or “5870
Invalid channel for M7321/Global -- must be 12 or less, or 00
for all.” as appropriate.
•If a Ctrl-M or Ctrl-V is used with a global command, it will be
rejected with the response: “5890 Cannot use Global ID for this
command.”
•Any 60 second timeout at any point in the entry of a cascade
command will cause the command to be aborted with the
message: “5180 Timed out entering cascade command.”