3Com CM 4000 223CM 4000 Installation and Operating Manual

Hardware Installation
2−23CM 4000 Installation and Operating Manual
HORIZON CONNECTIONS
The CM 4000 can be connected to a Horizon matrix router through the General Purpose Interface with Terminal/Computer
Interface software (GPI−T/CI) (see Figure 2−26). The protocol for the GPI−T/CI RS−422 port must be set at: 38400 baud,
8 data bits, even parity, and 1 stop bit (refer to the Horizon GPI−T/CI Manual for configuration instructions).
Figure 2−26. Connection to Horizon matrix router.
See Figure 2−27 for a description of this cable
Horizon protocol
RS−422 port
General Purpose
Interface
(GPI)
to Horizon router
House time
code
(optional).
See pg.
2−64
CM 4000 System Controller
Serial Port
LAN
Serial Port
Figure 2−27. Cable for connecting CM 4000 to Horizon matrix router.
1
6
R− 2
7
3
T−
8
4
9
5
R+
T−
to CM 4000
serial port
to Horizon GPI−T/CI
RS−422 Port
G Ground
R− Receive minus
R+ Receive plus
T+ Transmit plus
T− Transmit minus
DB9P
(male) DB9P (male)
= twisted pair
1
6
2
7
3
8
4
9
5
T+ R−
R+
T+
G G