Allied Telesis AT-8600 Series Application guide

AT-8600 Series Switch
Hardware Reference
AT-8624T/2M
AT-8624PoE
AT-8648T/2SP

AT-8600 Series Hardware Reference
Document Number C613-03080-00 REV G
© 2006-2008 Allied Telesis Inc. All rights reserved. No part of this publication may be
reproduced without prior written permission from Allied Telesis Inc.
Allied Telesis Inc. reserves the right to change specifications and other information in
this document without prior written notice. The information provided herein is subject
to change without notice. In no event shall Allied Telesis Inc. be liable for any incidental,
special, indirect, or consequential damages whatsoever, including but not limited to lost
profits, arising out of or related to this manual or the information contained herein, even
if Allied Telesis Inc. has been advised of, known, or should have known, the possibility
of such damages.
All company names, logos, and product designs that are trademarks or registered
trademarks are the property of their respective owners.

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Contents
Models Covered by this Document .................................................................... 4
Hardware Description ....................................................................................... 4
Switch Overview ......................................................................................... 4
AT-8624T/2M Model .................................................................................. 6
AT-8624PoE Model ..................................................................................... 6
AT-8648T/2SP Model .................................................................................. 6
Implementing PoE ............................................................................................. 7
LEDs ................................................................................................................. 7
Expansion Options .......................................................................................... 11
Switch Start-Up .............................................................................................. 12
Ports ............................................................................................................... 15
RS-232 Terminal Port (ASYN0) .................................................................. 15
RJ-45 Ports ............................................................................................... 16
Redundant Power Supply (RPS) ....................................................................... 17
Cables ............................................................................................................ 19
Terminal and Modem Cables .................................................................... 19
Cable Guidelines ...................................................................................... 21
Using AT-TFTP Server ....................................................................................... 21
Using Windows Terminal and Hyperterminal ................................................... 22
Test Facility ..................................................................................................... 25
10/100 Ethernet LAN Port Tests ................................................................ 26
Testing Switch Interfaces ................................................................................. 27
Troubleshooting .............................................................................................. 27
Common Problems and Solutions ............................................................. 28
For More Information ...................................................................................... 29

4AT-8600 Series
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Models Covered by this Document
This Hardware Reference includes information on the following models:
■AT-8624T/2M 24-port 10BASE-T/100BASE-TX
■AT-8624PoE
■AT-8648T/2SP 48-port 10BASE-T/100BASE-TX
The latest Hardware Reference can be found at www.alliedtelesis.com/
support/software.
Hardware Description
This section provides an overview of the hardware features for AT-8600 Series
switches. Hardware descriptions for expansion modules are in the Expansion
Modules Installation Guide. These references can be found on the CD-ROM
provided with your switch, or can be downloaded from
www.alliedtelesis.com/support/software.
Switch Overview
RJ-45 copper ports ensure industry-standard compatibility, while two
expansion module bays add configuration flexibility.
Dimensions ■Height = 44 mm (plus 5.5 mm if the rubber feet are used)
■Width = 440 mm (excluding rack-mounting brackets)
■Depth:
• AT-8624T/2M = 223mm
• AT-8624PoE = 408mm
• AT-8648T/2SP = 254mm
■Weight = not more than 7 kg (excluding power cord and expansion
modules)
Mounting system ■1 RU 19-inch rack mounting
Environmental
conditions
■Operating temperature range: 0 to 40º C (32 to 104º F)
■Storage temperature range: -25 to 70º C (-13 to 158º F)
■Operating humidity range: 5% to 80% non-condensing
■Storage humidity range: 5 to 95% non-condensing
Regulatory
standards
■EMC: EN55022, AS/NZS CISPR22 class A, FCC CFR47 Part 15 Class A,
and VCCI Class A
■Immunity testing to EN55024
■Flicker and Harmonics testing to EN61000-3-2 and EN61000-3-3
■Safety: UL60950-1, CAN/CSA-C22.2 No. 60950-1-03, EN60950-1,
EN60825-1
LEDs ■Ethernet port and System status LEDs
■Mode button
■For a complete list of LEDs and their functions, see “LEDs” on page 7.

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Power Supply Unit ■Universal 100/240 VAC 50/60 Hz input
■Redundant DC Power connection
Switching core ■Advanced ASIC switch chip
■Wire-speed L2 and L3 IP Switching
Processing core ■200 MHz CPU
■16 MBytes RAM
■8 MBytes flash memory
Asynchronous serial
port
■Up to 115 kbps
■Standard DB9 female RS-232 connector
Expansion module
bays
Expansion module bays are included on the AT-8624T/2M and AT-8624PoE
switches.
■2 bays for expansion modules
■Support for gigabit Ethernet expansion modules

6AT-8600 Series
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AT-8624T/2M Model
• 24-port 10BASE-T/100BASE-TX (RJ-45 connectors)
• Two expansion module bays
• Auto-negotiating advanced fast Ethernet switch
Figure 1: AT-8624T/2M front and rear panels
AT-8624PoE Model
• 24-port 10BASE-T/100BASE-TX (RJ-45 connectors)
• Two expansion module bays
• Auto-negotiating advanced fast Ethernet switch
Figure 2: AT-8624TPoE front and rear panels
AT-8648T/2SP Model
• 48-port 10BASE-T/100BASE-TX (RJ-45 connectors)
• Two Gigabit uplink ports, SFP or copper
• Auto-negotiating advanced fast Ethernet switch
Figure 3: AT-8648T/2SP front and rear panels
1 3 5 7 9 11 13 15 17 19 21 23
2 4 6 8 1012141618202224
LINK
MODE
LINK
MODE
FAULT
RPS
MASTER
PWR
13 57 911
2 4 6 8 10 12
13 15 17 19 21 23
14 16 18 20 22 24
26
COL
100
FULL
ACT
AT-8624T/2M Layer 3 Fast Ethernet Switch
MODE RS-232
TERMINAL PORT
STATUS
25
1 3 5 7 9 11131517192123
2 4 6 8 10 12 14 16 18 20 22 24
FAULT
RPS
MASTER
PWR
MODE
1357911
2 4 6 8 10 12
13 15 17 19 21 23
14 16 18 20 22 24
STATUS
26
RS-232
TERMINAL PORT
COL HALF DUP FULL DUP
ACT100 LINK 10 LINK ACT
PD ON MAX CURRENTPD ERR
AT-8624POE Layer 3 Fast Ethernet Switch
25
SFP
50
STATUS
49
LINK 49R MODE
LINK 50R MODE
LINK
LINK
MODE
COL
SPD
FDX
ACT
FLT
MSTR
RPS
PWR
CLASS 1
LASER PRODUCT
DO NOTSTARE
INTOBEAM
AT-8648T/2SP Layer 3 Fast Ethernet Switch

Hardware Reference 7
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Implementing PoE
The IEEE 802.3af standard, which is the IEEE standard for PoE, describes two
methods for implementing PoE over twisted pair cabling. One method uses the
same strands that carry the network traffic and the other the spare strands.
The PoE implementation on the AT-8624PoE switch transmits power over the
same strands that carry the network traffic (strands 1, 2, 3 and 6). The power
transfer does not interfere with the network traffic. The power and the network
traffic can coexist on the same strands simultaneously.
Powered devices that comply with the IEEE 802.3af standard support both
methods of power delivery. As long as a powered device is compliant with the
standard, it should be able to receive its power from the switch.
LEDs
The following tables outline how the switch and expansion modules report
faults and operational activities. Expansion modules are optional and can be
purchased separately. Contact an authorised Allied Telesis distributor or
reseller, or visit www.alliedtelesis.com for more information on expansion
modules.
System LEDs
Use the Mode Select button to toggle the Mode LEDs to the desired state.
Toggling the Mode Selection button does not affect the normal switch
operations.
LED State Description
FAULT Off Switch operation is normal.
Red The switch or management software is malfunctioning.
1 flash A switch fan has failed.
3 flashes The main PSU has failed and the RPS is now providing
power.
4 flashes The RPS Monitor is set to ON, and the RPS is not
functioning, either because it has failed or has been
switched off.
5 flashes The RPS Monitor is set to ON, but the RPS is not
connected.
7 flashes For the AT-8624T/2M and AT-8624PoE switches: An
expansion module has been inserted or removed while
the switch is powered on.
MASTER Off This LED is not supported.
RPS Green An optional redundant power supply is connected to the
switch.
OFF There is no optional redundant power supply connected
to the switch.
PWR Green The switch is receiving power and the voltage is within
the acceptable range.
Off The switch is not receiving power.

8AT-8600 Series
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AT-8624T/2M switch
Link and Mode LEDs
AT-8624PoE switch
Link and Mode LEDs
LED State Description
LINK OFF There is no link between the port and the end-
node.
Green A valid link has been established between the
port and the end-node.
Mode - COL OFF No data collisions are occurring on the port.
Flashing Green Data collisions are occurring on the port.
Mode - 100 OFF The port is operating at 10 Mbps.
Green The port is operating at 100 Mbps.
Mode - FULL OFF The port is operating in half-duplex mode.
Green The port is operating in full-duplex mode.
Mode - ACT OFF There is no activity on the port.
Flashing Green There is activity on the port. It is transmitting
and/or receiving data.
LED State Description
L/A Status
(Top LED)
OFF There is no link between the port and the end-
node.
Green The port is operating at 100 Mbps.
Flashing Green There is activity on the port. It is transmitting
and/or receiving data at 100 Mbps.
Amber The port is operating at 10 Mbps.
Flashing
Amber
There is activity on the port. It is transmitting
and/or receiving data at 10 Mbps.
Mode LEDs
(Bottom LED)
OFF Either DC mode or PoE mode.
D/C Mode OFF There is no link between the port and the end-
node.
Green The port is operating in full duplex mode.
Amber The port is operating in half-duplex mode.
Flashing
Amber
The port is operating in half-duplex mode and
data collisions are occurring on the port.
PoE Mode OFF There is no powered device detected.
Green The end node is a powered device and the port
is providing power to it.
Amber The port is experiencing a problem providing
PoE to the end node.
Flashing
Amber
The port is connected to a powered device but
providing power to it would exceed the
maximum PoE power budget of the switch.

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AT-8648T/2SP switch
Link and Mode LEDs
AT-8648T/2SP switch
10/100/1000Base-T
and SFP LEDs
AT-A45/xx Series
Expansion Module
LEDs
LED State Description
LINK OFF There is no link between the port and the end-
node.
Green A valid link has been established between the
port and the end-node.
Mode - COL OFF No data collisions are occurring on the port.
Flashing Green Data collisions are occurring on the port.
Mode - SPD OFF The port is operating at 10 Mbps.
Green The port is operating at 100 Mbps.
Mode - FDX OFF The port is operating in half-duplex mode.
Green The port is operating in full-duplex mode.
Mode - ACT Flashing Green There is activity on the port
OFF There is no activity on the port.
LED State Description
LINK OFF There is no link between the port and the end-
node.
Green A valid link has been established between the
port and the end-node.
Mode - COL OFF No data collisions are occurring on the port.
Flashing Green Data collisions are occurring on the port.
Mode - SPD OFF The port is operating at 10/100 Mbps.
Green The port is operating at 1000 Mbps.
Mode - FDX OFF The port is operating in half-duplex mode.
Green The port is operating in full-duplex mode.
Mode - ACT Flashing Green There is activity on the port
OFF There is no activity on the port.
LED State Description
LINK Steady green The port has established a valid link with the
end node.
Flashing green The port is transmitting and/or receiving data.
Duplex Steady green The port is operating in full duplex.
Steady amber The port is operating in half duplex.
Flashing amber Collisions are occurring on the port.

10 AT-8600 Series
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AT-A46 Expansion
Module LEDs
AT-A47 Expansion
Module LEDs
AT-A65 Expansion
Module LEDs
LED State Description
LINK 10 Green The port has established a valid 10 Mbps link
with the end node.
LINK 100 Green The port has established a valid 100 Mbps link
with the end node.
Both LINK 10 and
LINK 100
Green The port has established a valid 1000 Mbps link
with the end node.
FULL DUPLEX Green The port is operating in full duplex.
OFF The port is operating in half duplex.
ACTIVITY Green The port is transmitting and/or receiving data.
LED State Description
LINK Steady green The port has established a valid 1000 Mbps link
with the end node.
ACTIVITY Flashing green The port is transmitting and/or receiving data.
LED State Function
10 Green The port is operating at 10Mbps.
Off The port is not operating at 10Mbps.
100 Green The port is operating at 100Mbps.
Off The port is not operating at 100Mbps.
Both 10 and 100 Green The port is operating at 1000Mbps.
FDX Green The port is operating in full duplex mode.
Off The port is operating in half duplex mode.
ACT Flashing green There is data activity on the port.
Off There is no data activity on the port.

Hardware Reference 11
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Expansion Options
Expansion modules increase switching capacity by providing two extra ports
and by allowing switches to be linked together in stacks. Use only the modules
in the following table.
For a current list of expansion modules or more information, contact your
authorised Allied Telesis distributor or reseller. You can also see these
documents:
■AT-A65 Expansion Module Installation and Safety Guide for the AT-A65
module only
■AT-A45/xx Series, AT-A46, and AT-A47 Expansion Modules Installation Guide
for the other expansion modules available for AT-8600 Series switches.
You can download these documents and updates from
www.alliedtelesis.com/support/software.
You need Adobe®Acrobat®Reader®software to view, search, or print these
documents. You can download it from www.adobe.com.
Adding and Removing Expansion Modules
Hot-swapping expansion modules is possible on AT-8624PoE and
AT-8624T/2M switches. If a module is inserted or removed while the switch is
powered on, the Fault LED flashes 7 times. You must restart the switch to turn
off the flashing LED, and make a module ready for operation. Until the switch
is restarted, the output of the show system and show switch port commands
cannot reflect the newly inserted or removed expansion module.
Expansion Module Port Type Connector Type
AT-A45/MT 100Base-FX MT-RJ
AT-A45/5C 100Base-FX SC
AT-A45/5C-SM15 100Base-FX SC
AT-A46 10/100/1000BASE-T RJ-45
AT-A47 1000Base-T (GBIC) GBICs are sold separately.
AT-A65 1000Base-X SFP
expansion bay, or
10/100/1000Base-T
copper port
SFPs are sold separately.
Copper port takes an
RJ-45 connection.

12 AT-8600 Series
C613-03080-00 REV G
Switch Start-Up
When the switch starts up following a power cycle or an operator-initiated
reboot (using the reset button or restart command), it performs a series of tests
and sends messages to the terminal or PC connected to the ASYN0 port. After
the switch successfully starts, a prompt is displayed for you to log in. Refer to
the Installation and Safety Guide for basic login instructions or to the Getting
Started chapter in the Software Reference.
Process flow When the switch starts, it performs the following operations.
Overrides The switch pauses briefly during routine startup messages to display the
following prompt:
Force EPROM download (Y)?
If you do nothing, switch software is loaded along with a preconfigured
startup script. For troubleshooting, change the process by using the following
keys.
Stage This happens... Done by...
1 Self-tests run that check basic operations. Boot ROM
2 A prompt is displayed briefly to allow a user-override. Users
can change the startup process by pressing special keys (see
Overrides). If they enter nothing, the process continues.
Boot ROM
3 The flash boot release is loaded as the install software. Boot ROM
4 Install information is checked and the switch boots up from
either the preferred or default install.
Boot ROM
5 The startup configuration script that the user specified is
executed.
Preferred or
default software
6 Startup is complete and the switch starts switching traffic if
devices connected to it are sending traffic.
Release software
Pressing this key... Forces the switch to...
Y Load the flash boot release with no patch.
S Start with the default configuration so that any boot script is ignored.
Ctrl+D Enter diagnostics mode.

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Regular output The following messages are an example of output from the switch.
Types of messages The following table explains the types of messages that the switch generates
during initial startup.
AlliedWare
messages
The following table explains messages in the output from the switch.
INFO: Self tests beginning.
INFO: RAM test beginning.
PASS: RAM test, 32768k bytes found.
INFO: Self tests complete.
INFO: Downloading switch software.
Force EPROM download (Y) ?
INFO: Initial download successful.
INFO: Initialising Flash File System.
INFO: IGMP packet trapping is active for IGMP snooping, L3FILT
is activated
INFO: Executing configuration script <flash:boot.cfg>
INFO: Switch startup complete
login:
Type Description
INFO An action has been taken by the system.
PASS A test has been completed successfully.
ERROR An error message that a test has failed but the system continues to
operate.
FAIL An error message that a fatal error condition has caused the system to halt
in an unrecoverable fashion.
Message Description
INFO: Self tests beginning. Code loader tests are about to begin.
INFO: RAM tests beginning RAM tests are about to begin.
PASS: RAM test, 131072k
bytes found
RAM test passed and the switch is using the indicated
amount of memory.
ERROR: RAM test test-number.
Error address = address
For example:
ERROR: RAM test 5. Error
address = 00345678
The given RAM test failed at the given address, which
means the memory system is faulty. The test repeats until
it passes. If the error continues, contact your authorised
distributor or reseller.
INFO: BBR tests beginning BBR battery tests are about to begin.
PASS: BBR test. Battery OK BBR battery tests passed.
ERROR: BBR Battery low BBR battery test failed, indicating that the battery is
running low. The BBR battery must be replaced. Contact
your authorised Allied Telesis distributor or reseller.
PASS: BBR test, 512k bytes
found
BBR size/location test passed with the indicated amount of
BBR found.

14 AT-8600 Series
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FAIL: BBR test. Error address =
location
BBR size/location test failed at the given location. The test
at this location failed, indicating the end of memory, but a
valid location was discovered in the 255 long words
following this location. The BBR system must be replaced.
Contact your authorised distributor or reseller.
FAIL: BBR test, only 16k bytes
found
The BBR size/location test completed, but only the
displayed amount of memory was found. This amount is
less than the minimum required to run the switch
software.
INFO: Self tests complete Startup tests have finished.
INFO: Downloading switch
software
The process of downloading the switch software and
vector table from ROM is about to begin.
ERROR: Code load retried
FAIL: Code load failed
Loading code from ROM to RAM failed. The load is retried
a number of times, and the error message is displayed
each time it fails. The fail message is displayed if the switch
reaches the maximum number of attempts.
Force EPROM download (Y) ? Prompt that lets you override the standard startup
sequence, typically when troubleshooting.
INFO: Initial download
succeeded
Startup tests and download are complete, and the switch
software is about to be started.The release is now
decompressed. This may take a few seconds.
INFO: Downloading
compressed release. This may
take up to 1 minute...
INFO: Loading software into
memory. This may take up to 1
minute...
The main switch software is decompressed before being
loaded into RAM.
INFO: Executing configuration
script <script-name>
Configuration commands in the given script file begin
executing if selected by the user. If the script has an error,
appropriate error messages are displayed.
INFO: Switch startup complete The startup process is complete and the switch is ready. If
devices connected to it are sending traffic, then the switch
begins switching operations.
Message Description (Continued)

Hardware Reference 15
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Ports
This section explains pin assignments for the following:
■RS-232 Terminal Port (ASYN0)
■RJ-45 Ports
RS-232 Terminal Port (ASYN0)
The RS-232 ASYN0 port connects the switch to a management device for initial
configuration. This port allows the software on the switch to be accessed from a
terminal or a PC running terminal emulation software.
The ASYN0 port has an RJ-45 socket with an industry recognised pinout. This
requires using a straight-through RJ-45 cable with an RJ-45 DB9 connector
when the switch is connected to a terminal or PC. The socket is wired as a DTE
and the pin layout is shown in the following figure and table.
See “Terminal and Modem Cables” on page 19 for more information on
connection options for the RS-232 terminal port.
Pin Role
1RTS
2 DTR (DSR and DTR are connected but have no other internal connection)
3TXD
4GND
5GND
6RXD
7 DSR (DTR and DSR are connected but have no other internal connection)
8CTS
rjpin1
8
1

16 AT-8600 Series
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RJ-45 Ports
For 10BASE-T/100BASE-TX connections, a twisted pair cable must be used.
Each pair is identified by two different colours. For example, one wire might be
red, and the other red with a white stripe. An RJ-45 connector must be fitted to
both ends of the cable. The following figure shows the pin layout for RJ-45
connectors.
Figure 4: RJ-45 pin layout
With 10BASE-T/100BASE-TX cables, pins 1 and 2 are used for transmitting
data, while pins 3 and 6 are used for receiving data. The following table lists
the RJ-45 Pin assignments.
1. The “+” and “-” signs represent the polarity of the wires that make up each wire pair.
If a twisted pair cable is to join two ports and only one of the ports has an
internal crossover, the two pairs must be straight through, as listed in the
following table.
If a twisted pair cable is used to join two ports and either both ports are
labelled with an “X” or neither port is labelled with an “X”, a crossover must be
included in the wiring. The following table lists the RJ-45 crossover wiring pin
assignments.
Pin Number Assignment1
1TX+
2TX-
3RX+
6RX-
End 1 End 2
1 (TX+) 1 (TX+)
2 (TX-) 2 (TX-)
3 (RX+) 3 (RX+)
6 (RX-) 6 (RX-)
End 1 End 2
1 (TX+) 3 (TX+)
2 (TX-) 6 (TX-)
3 (RX+) 1 (RX+)
6 (RX-) 2 (RX-)
1
8
1
8
RJPIN

Hardware Reference 17
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For 1000BASE-T RJ-45 cables, all four pairs are used and the cable is wired in a
straight-through configuration. The following table lists the pin assignments.
Caution Do not plug a phone jack into any RJ-45 port. Doing so could damage
the switch. Use only twisted pair cables with RJ-45 connectors.
Redundant Power Supply (RPS)
AT-8600 Series switches have a Redundant Power Supply (RPS) connector on
their rear panel. The RPS connector differs for different switch models.
For information about the RPS for AT-8624T/2M and AT-8648T/2SP switches,
Figure 5 illustrates the pin layout to the 16-pin molex connector and RPS port.
Table 1 lists the connector’s pin numbers and pin functions.
For information about the RPS for the AT-8624PoE switch, Table 2 on page 18
lists the connector’s pin numbers and pin functions.
Figure 5: RPS 16-pin molex connector pin layout for AT-8624T/2M and AT-8648T/2SP
End 1 End 2
1 Pair 1+ 1 Pair 1+
2 Pair 1- 2 Pair 1-
3 Pair 2+ 3 Pair 2+
6 Pair 2- 6 Pair 2-
4 Pair 3+ 4 Pair 3+
5 Pair 3- 5 Pair 3-
7 Pair 4+ 7 Pair 4+
8 Pair 4- 8 Pair 4-
Table 1: RPS connector pin numbers and functions for AT-8624T/2M and AT-8648T/2SP
Pin Number Function
1 +12 VDC
2 Remote Sense (RS) +5 VDC
3 Remote Sense (RS) Ground
4 Remote Sense (RS) +3.3 VDC
5 Redundant Power Supply (RPS) Present
6 Ground (+3.3 VDC Return)
7 Ground (+5 VDC Return)
8+5VDC
9 Ground (+12 VDC Return)
10 +3.3 VDC
16
8
9
1
9
116
8

18 AT-8600 Series
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AT-8624PoE pin layout For the AT-8624 PoE switch, the pin layout is different. The molex connector
has 15 power pins, plus 2 high current pins. The pin layout is as follows.
For the female unit connector:
■The top row contains 7 pins. Pins are numbered 1-7, from right to left.
■The bottom row contains 8 pins. Pins are numbered 8-15, from right to left.
■On the left of the connector is the A2 pin.
■On the right of the connector is the A1 pin.
For the male cable connector:
■The top row contains 7 pins. Pins are numbered 1-7, from left to right.
■The bottom row contains 8 pins. Pins are numbered 8-15, from left to right.
■On the right of the connector is the A2 pin.
■On the left of the connector is the A1 pin.
11 Ground (+3.3 VDC Return)
12 +3.3 VDC
13 Ground (+3.3 VDC Return)
14 +3.3 VDC
15 +5 VDC
16 Ground (+5 VDC Return)
Table 1: RPS connector pin numbers and functions for AT-8624T/2M and AT-8648T/2SP
Pin Number Function
Table 2: RPS Connector Pin Numbers and Functions for AT-8624PoE.
Pin Number Function
1 48V
2 48V Remote Sense
3 Redundant Power Supply (RPS) Present
4 12V Remote Sense Return
5 12V Remote Sense
6 +12V
7+3v3
8 48V
9 48V
10 48V Remote Sense Return
11 Redundant Power Supply (RPS) OK
12 +3v3 Remote Sense Return
13 +3v3 Remote Sense
14 +3v3
15 +3v3
A1 Isolated Ground
A2 Ground

Hardware Reference 19
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Cables
This section describes how to make cables for connecting switch interfaces to
networks, terminals, and printers.
Terminal and Modem Cables
The following figure shows how to wire cables to connect a standard VT100
compatible terminal, or a modem, to the switch’s RS-232 Terminal Port.
Notes:
(1) →Output from switch; ←Input to switch.
(2) Cable version 1.0.
DB9MDB9Fsw
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Cable
Pin 9 Pin 6
Pin 5 Pin 1
DB9 Female Pin View
Pin 6 Pin 9
Pin 1 Pin 5
DB9 Male Pin View
DB9 Male
(to switch/DCE)
DB9 Female
(to PC/terminal/DTE)
Not connected
→ (TXD)
← (RXD)
← (CD)
(GND)
→ (DTR)
← (CTS)
→ (RTS)
← (RING)
(DCD)
(RXD)
(TXD)
(DTR)
(GND)
(DSR)
(RTS)
(CTS)
(RING)

20 AT-8600 Series
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The following figure shows the pin wiring diagram for a DCE RS-232 Terminal
Port (DB9 female connector) male to male modem cable
The switch’s RS-232 terminal port has a DCE female socket so that you can use
a straight-through cable when connecting the switch to a terminal or PC.
However, output from the show asyn command still has a DTE perspective.
The internal DTE pin roles are listed in the following table.
Pin Role
2TXD
3RXD
4CD
5GND
6DTR
7CTS
8RTS
Notes:
(1) →Output from switch; ←Input to switch
(2) Cable version 1.0.
DB9MDB9Fsw
3 (TXD)
2 (RXD)
1 (DCD)
5 (GND)
4 (DTR)
8 (CTS)
7 (RTS)
9
6 Not connected
1
2
3
4
5
6
7
8
9
Cable
Pin 9 Pin 6
Pin 5 Pin 1
DB9 Male Pin View
Pin 6 Pin 9
Pin 1 Pin 5
DB9 Male Pin View
DB9 Male
(to switch/DCE)
DB9 Male
(to modem/DCE)
Not connected
→ (TXD)
← (RXD)
← (CD)
(GND)
→ (DTR)
← (CTS)
→ (RTS)
(RING)