Microgate SyncLink USB - SyncLink USB V.35 Interface Pinout; V.35 Male DTE Pin Assignments

V.35
The V.35 standard uses a mix of single ended and differential signals on a 34-pin block connector. To use
this standard, select V.35 in software and use the MicroGate V.35 cable (Part # 2534GT, picture shown
below).
Note that the LL, RL, and RI signals are available on the adapter’s DB-25 connector when the V.35
interface is selected, but are not available (NC = no connect) on the 34-pin block connector when using
the V.35 cable.
The maximum data rate supported by the adapter when using V.35 is 10Mbps. Cable length and signal
loading may reduce the maximum usable data rate from this value.
V.35 Male DTE
Signal Name
Electrical Desc
DB25
Pin #
V.35 Block
Pin #
Direction
Earth/Shield Ground
1
A
TxD (-/A), Transmit Data
RS-422/V.11
2
P
Output
RxD (-/A), Receive Data
RS-422/V.11
3
R
Input
RTS, Request to Send
RS-232/V.28
4
C
Output
CTS, Clear to Send
RS-232/V.28
5
D
Input
DSR, Data Set Ready
RS-232/V.28
6
E
Input
Signal Ground
7
B
DCD, Data Carrier Detect
RS-232/V.28
8
F
Input
RxC (+/B), Receive Clock
RS-422/V.11
9
X
Input
AuxClk (+/B), DTE Clock Output
RS-422/V.11
11
W
Output
TxC (+/B), Transmit Clock
RS-422/V.11
12
AA
Input
TxD (+/B), Transmit Data
RS-422/V.11
14
S
Output
TxC (-/A), Transmit Clock
RS-422/V.11
15
Y
Input
RxD (+/B), Receive Data
RS-422/V.11
16
T
Input
RxC (-/A), Receive Clock
RS-422/V.11
17
V
Input
LL, Local Loopback Control
RS-232/V.28
18
NC
Output
DTR, Data Terminal Ready
RS-232/V.28
20
H
Output
RL, Remote Loopback Control
RS-232/V.28
21
NC
Output
RI, Ring Indicator
RS-232/V.28
22
NC
Input
AuxClk (-/A), DTE Clock Output
RS-422/V.11
24
24
Output
Figure 2 V.35 Cable (Part# 2534GT)