Comtech EF Data C5 - Manual (Page 119)

C5/K1/K3 Integrated Satellite Terminal System Installation
Rev. 0 3–23
Table 3-7. 34-Pin Winchester Connector Pinouts (V.35)
34 V.35 34 V.35
R RX Data A (RD A) C Request to Send (RTS)
T RX Data B (RD B) D Clear to Send (CTS)
P Send Data A (SD A) F RX Line Signal Detect (RLSD)
S Send Data B (SD B) E Data Set Ready (DSR)
Y Serial Clock TX A (SCT A) c (CC) External Reference Clock A (EXC A)
a (AA) Serial Clock TX B (SCT B) d (DD) External Reference Clock B (EXC B)
U Serial Clock TX External A (SCTE A) n (NN) Demodulator Fault
W Serial Clock TX External B (SCTE B) m (MM) Modulator Fault
V Serial Clock RX A (SCR A) A Ground
X Serial Clock RX B (SCR B) B Ground
Note: Pins H, J, K, L, M, N, Z, b (BB), e (EE), f (FF), h (HH), j (JJ), k (KK), l (LL) have no
connection.
The IDU is available with a Winchester
% V.35 as the data I/O connector (PL/6032).
There is a jumper on the unit that either opens or closes the CC line. The interface is
shipped with jumpers in positions 2 and 3, because:
1. EFData has determined that several locations use Fireberd% test equipment and a
conflict will occur if CC is connected between the modem and the Fireberd%.
2. Placing the jumper in positions 2 and 3 opens up the CC line, because the
TTC/Fireberd% test equipment interfaces use the line for DTE/DCE control.
3. Grounding pin CC at the Fireberd% interface will change the Fireberd % to a
DCE device.
4. EFData uses the CC and DD for the input master clock (same as the external clock
input to the modem). To input an external clock, change the jumper to positions 1
and 2 (the pin closest to the Winchester connector).