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Supervisory
Terminal
Connection
DIRECT
CONNECTION
APPLICATION
To allow software-control
nance, connect the Supervisory terminal as described below. It can be
connected directly to the CSU, or indirectly using modems or PMC-100
Performance Monitor Cards. Modems allow the Supervisory terminal to
be located away from the CSU, while PMC-100s provide enhanced network
control and allow one Supervisory terminal to be easily shared among
all CSUs in the network. The Supervisory terminal can be any ANSI
X3.64-compatible ASCII terminal that supports asynchronous EIA/TIA-232-
E communications. The DataComm 551 Supervisory port supports:
• data rates from from 2400 to 19,200 bps
• one start bit
• a word length of 7 or 8 data bits
• even, odd, or no parity
• one or two stop bits (depending on the data rate).
See Figure 2-3 for the switch selections required to match the DataComm
551 to the Supervisory terminal's parameters.
Be sure to configure each CSU in the network to match
the Supervisory terminal's data rate and character
format.
The Supervisory port pin functions for all installations are as follows:
Pin No.
Function
2
Send Data
3
Receive Data
4
Request To Send
7
Signal Ground
8
Carrier Detect
Refer to Supervisory Terminal Operating Procedures in Section 3 for fur-
ther discussion.
The following paragraphs describe directly connecting an on-site Super-
visory terminal to the CSU's Supervisory port. However, this basic infor-
mation applies also to connecting the Supervisory terminal via other de-
vices (such as modems and PMC-100s) described later for other applica-
tions.
of
configuration,
diagnostics,
NOTE
Direction
From terminal
To terminal
From terminal
n/a
To terminal
INSTALLATION
and
mainte-
2-23
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