V.11 interface – Interphase Tech iSPAN User Manual
Page 49
Chapter 3: Connecting to the Line
iSPAN Serial WAN Adapter Users Guide
29
V.11 Interface
The following specifications describe the V.11 interface:
• Electrical
specification: CCITT V.11, CCITT X.27,
TIA/EIA RS-422 (0-5V differential)
• Signaling
specification: CCITT X.21
• Maximum
data
rate: 2 Mbps (card limitation)
• Maximum
cable
length: 150 feet (at 2 Mbps)
• Standard DCE connector: ISO 4903 (DB15)
The following table and illustrations describe the V.11 signals
on the connector..
Pin #
Tw. Pair
Name (CCITT #) Signal
Direction
2
I
T(A) (103A)
Transmit Data
Out
14
I
T(B) (103B)
Transmit Data
Out
3
II
R(A) (104A)
Receive Data
In
16
II
R(B) (104B)
Receive Data
In
24
III
X(A) (113A)
Transmit Clock
Out
11
III
X(B) (113B)
Transmit Clock
Out
17
IV
S(A) (115A)
Receive Clock
In
9
IV
S(B) (115B)
Receive Clock
In
4
V
C(A) (105A)
Command
Out
19
V
C(B) (105B)
Command
Out
5
VI
I(A) (109A)
Indication
In
13
VI
I(B) (109B)
Indication
In
18
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-ENV11
V.11 Interface enable
In