C
HEETAH
64
S
ERIES
–
C
HAPTER
8
81-9059-0577-0
Rev. E
Proprietary Information of
PESA Switching Systems
8-19
•
COM 2 is a secondary RS-232 CPU Link, which may also be connected to a PC or an
external control device. COM 2 may be used with either of the protocols shown in Table
8-9 and may operate at either 9600 or 38,400 baud. Set the baud rate with a switch on the
controller board. Make sure the communication rate for COM 2 in the 3500 Series software
matches the baud rate you are using (in the software, select
System > Communications
).
T
ABLE
8-9
PESA CPU Link Protocols
PROTOCOL
DOCUMENT #
CPU Link Protocol No. 1 Extensions (P1E)
81-9062-0408-0
Unsolicited Status Protocol (USP)
81-9062-0409-0
8.8.2
RS-422 Control Connectors COM3/PRC
This DB-9 Male connector (see Figure 8-11) provides an RS-422 serial communication interface.
F
IGURE
8-11
RS-422 COM 3/PRC Control Connector
COM 3/PRC is the communications interface to a PRC type routing switcher system and is
connected to a routing switcher with a serial control cable (refer to Table 8-10 for pin
assignments).
T
ABLE
8-10
COM 3/PRC Pin Assignments
Pin
Signal
In/Out
1
CTS+
Input (not used)
2
Bi-directional
3
CTLR-
Output
4
RTS-
Output (not used)
5
Ground
---
6
CTS-
Input (not used)
7
MATRIX-
Bi-directional
8
CTLR+
Output
9
RTS+
Output (not used)
Pin 1
Pin 9
Содержание 64NE
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