Table of Contents
Advertisement
18 — RS-232 DCM
18.1
Understanding the RS-232 DCM
The RS-232 DCM is a dual-circuit module that offers data connectivity conforming
to EIA/TIA-232 standards. The module can be installed in either interface module
position on the Control card.
Data devices connect directly to this DCM, eliminating the need for an external
DTU.
Before you can set data circuit operating parameters, you must:
•
configure a module position for an RS-232 DCM
•
know the operating characteristics of the data device connected to each circuit
Procedure 18-1 To specify an RS-232 DCM
CONFIG — POSITION — <pp> ↵ — TYPE — DATA — RS-232
where pp is 1 or 9
18.2
RS-232 DCM circuit operating parameters
Once you configure the module position, the two circuits (numbered 1 and 2) assume
the default settings for each of the following operating parameters:
•
device mode
•
device gender
•
full duplex
•
RTS/CTS delay
•
control signals
•
data structure (asynchronous only)
•
clocking (synchronous only)
•
multidrop data bridge
•
rate adaption
For information on configuring rate adaption, see chapters 21 and 22.
18-2
•
transport bandwidth
•
transport position
•
signaling and the signaling bit position
•
interface speed (or data rate)
•
data position
2902 MainStreet Technical Practices
90-2906-01
May 2002
Advertisement
Table of Contents
