Specifications
Table Of Contents
- AT-8900 Series Hardware Reference
- Contents
- Models Covered By This Reference
- Why You Should Read This Reference
- Where To Find More Information
- Hardware Description
- Online Documentation
- AT-TFTP Server
- Using Windows Terminal and Windows Hyperterminal
- Switch Start-up
- RS-232 Terminal Port (ASYN0)
- Useful Cables
- Test Facility
- Power Supply Units (PSUs)
- Port, Connector, and Cable Combinations
- Troubleshooting
- Expansion Options
- Restricted Procedures
- Contacting Us
Hardware Reference 15
C613-03075-00 REV A
RS-232 Terminal Port (ASYN0)
This section introduces the switch’s RS-232 Terminal Port (ASYN0), including
its pin assignment and purpose.
The RS-232 ASYN0 Terminal Port is used to connect the switch to a
management device for initial configuration and switch management tasks.
This allows the switch’s software to be accessed from a terminal, or a PC
running terminal emulation software. You can also use ASYN0 to establish a
network connection from a remote site using SLIP and a modem.
ASYN0 has an RJ-45 socket with an industry recognised pinout. This requires
the use of a straight-through RJ-45 cable with an RJ-45 DB9F connector when
connecting the switch to a terminal or PC. The socket is wired as a DTE and the
pin roles are shown in Figure 3 on page 15 and listed in Table 3 on page 15.
See “Useful Cables” on page 16 for more information on suitable cables to use
with ASYN0.
Figure 3: RS-232 Terminal Port Pin Numbers
Table 3: Internal DTE pin roles.
Pin Role
1RTS
2DTR
1
1. DTR and DSR are connected together but have no other internal connection.
3TXD
4GND
5GND
6RXD
7DSR
1
8CTS
18
RJPIN1