Interfaces - Tahoe 684 User Manual

2.
Following connectors are found on the rear panel of the modem:
G.shdsl
2.1.
It is a 8-pin RJ-45 connector used to connect the leased line. The
pinout is similar to an EIA-568 (Cat5) connector. Subsequent lines may
be interchanged between modems - that condition will be automatically
detected. The polarization of a line is not important.
2.2.
The RS-232 serial console is used for modem management. It has
a DB9/M connector and works as a DTE, i.e. a null-modem cable should
be used to connect it to a PC. Three lines (bolded) are sufficient. Terminal
settings are 9600 bps, 8 data bits, 1 stop bit, no parity, no handshaking.
Pin Name
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
2

Interfaces

LAN
serial
(FastEthernet)
console
G.shdsl
Pin
1
2
3
4
5
6
7
8
Serial console
carrier detect, transmission readiness signaling
data received from the PC
data sent by the modem to the PC
active, when the PC is switched on
signal ground
active, when the modem is switched on
used by the PC to inform that is has data to send
used by the modem to permit data transmission
ring indicator (signal used in telephone modems)
power
connector
Tahoe 684
line 1
line 1
line 3
line 2
line 2
line 3
line 4
line 4
Description
power
switch
I
O
2
2.1
2.2