Grp Auxiliary Port Signals - Cisco 12416 Installation And Configuration Manual

Chapter 2 Preparing for Installation
Caution

GRP Auxiliary Port Signals

OL-11495-01
To maintain Class B EMI compliance, you must use shielded cables when
connecting to the auxiliary and console ports of original GRPs (part numbers
GRP= and GRP-B=). An updated version of the GRP-B= board (Rev. F0) does not
require shielded cables for Class B compliance.
The GRP auxiliary port is a DB-25 DTE port for connecting a modem or other
DCE device to the router. The auxiliary port supports hardware flow control and
modem control.
Table 2-2 lists the signals used on the auxiliary port.
Table 2-2 GRP Auxiliary Port Signals
Pin Signal Direction
1 GND —
2 TxD Output
3 RxD Input
4 RTS Output
5 CTS Input
6 DSR Input
7 GND —
8 DCD Input
20 DTR Output
22 RING Input
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
GRP Port Connection Guidelines
Description
Shield ground
Transmit data (to DCE)
Receive data (from DCE)
Request to send
(used for hardware flow control)
Clear to send (used for hardware flow control)
Data set ready
Signal ground
Carrier detect (used for modem control)
Data terminal ready (used for modem control
only)
Ring
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