Table of Contents
Advertisement
A2.2.3
X.21 interface
NOTE
This interface is not supported in the MAGIC AD1 ETI Decoder.
TAB. 5
1
8
Connector: SUB-D 15 pole
9
15
Pin
Signal
1
shield
2
TX a
3
CTL a
4
RX a
5
IND a
6
SCLK a
7
BCLK a
8
GND
9
TX b
10
CTL b
11
RX b
12
IND b
13
SCLK b
14
BCLK b
15
not used
a
PIN ASSIGNMENT: X.21 INTERFACE
Transmit Data a
Control a
Receive Data a
Indication a
Signal Element Timing a
a
Byte Timing a
Ground
Transmit Data b
Control b
Receive Data b
Indicate b
Signal Element Timing b
a
Byte Timing b
usually it will not be used
I n t e r f a c e s
Direction
Electrical characteristics
Type:
input
input
Level:
V.11, symmetric
output
Data rates:
8, 16, 24, 32,40, 48,
56, 64, 80, 96, 112, 128,
output
144, 160, 192, 224,256,
320, 384-kbit/s
output
output
Maximum cable length:
input
input
output
output
output
output
DCE with
Gender
Changer
100 m
P A G E 8 5
Advertisement
Table of Contents
