Mitel SX-200 Practices page 1168

Peripheral Devices
Connector Pin Assignment Tables
15.2 The RS-232 connector on the DATASET 2100 Series has the following pin
assignments when operating in Data Communications Equipment (DCE) mode:
Pin Signal
Designation Direction
1 frame ground
.'
- 2 TXD transmit data to dataset
3 RXD receive data from dataset
- 4 RTS request to send to dataset
,
5
CTS
clear to send from dataset
6 DSR data set ready from dataset
7 signal ground
8 DCD data carrier detect from dataset
20 DTR
data terminal ready to dataset
22 RI ring indicator
from dataset
25
HW flow control to dataset
The RS-232 connector on the DATASET 2100 Series has the following pin
assignments when operating in DataTerminal Equipment (DTE) mode with an attached
Modem Adapter:
Pin Signal
I
2
3
4
5
6
7
8
15
17
19
20
22
23
24
25
TXD
RXD
RTS
CTS
DSR
DCD
DB
DD
n/a
DTR
RI
CH
DA
CN
Designation
frame ground
transmit data
receive data
request to send
clear to send
data set ready
signal ground
data carrier detect
SCT
SCR
remote digital loopback
data terminal ready
ring indicator
data signal rate selector
XCLK
analog loopback
Direction
from dataset
to dataset
from dataset
to dataset
to dataset
to dataset
to dataset
to dataset
from dataset
from dataset
to dataset
from dataset
from dataset
from dataset
Synchronous Operation
15.3 Transparent
- The DATASET 2100 Series can operate in transparent synchronous
mode. Because the connections are usually established for a long time (compared to
asynchronous connections) and are important parts of a large data communications
network, the D channel connection is held up while the connection is established.
The network management process can obtain statistics on traffic and error rates
while a call is in progress from this D channel. When one DATASET 2100 drops its
126 15-2 Revision 0 9109-096-126-NA Issue1