Specifications
Appendix  A Connection Data  Installation and Operation Manual 
A-10  Data Channel Connection Data  FCD-E1LC Ver. 1.0 
FCD-E1LC Side  Designation  Function  User’s Side 
11  SCEB  External Send Clock (wire B)  X 
12  SCB  Send Clock (wire B)  – 
13  CTSB  CTS (wire B)  – 
14  SDB  Send Data (wire B)  T 
15  SCA  Send Clock (wire A)  – 
16  RDB  Receive Data (wire B)  S 
17  RCA  Receive Clock (wire A)  U 
18 –  Not connected  – 
19  RTSB  RTS (wire B)  – 
20  RCEA  External Receive Clock (wire A)  – 
21 –  Not connected  – 
22  DSRB  DSR (wire B)  – 
23  RCEB  External Receive Clock (wire B)  – 
24  SCEA  External Send Clock (wire A)  V 
25 –  Not connected  – 
DTE2 Mode 
This mode is used to connect to user’s equipment with V.35 DCE interface that 
provides the transmit and receive clocks to the FCD-E1LC data channel. 
The V.35 cable coming from the user’s equipment is connected to the FCD-E1LC 
CHANNEL connector through an adapter cable. The adapter cable (see 
Figure A-6
) 
is terminated in a 25-pin male D-type connector at the FCD-E1LC side, and a 
34-pin female connector at the user’s side. A suitable cable, designated 
CBL-HS2V3, is available from RAD. 
Cable wiring is given in 
Table A-8
. 
Table A-8. Wiring of V.35 Adapter Cable for DTE2 Mode 
FCD-E1LC Side  Designation  Function  User’s Side 
1 FG Frame Ground  A 
2  SDA  Send Data (wire A)  R 
3  RDA  Receive Data (wire A)  P 
4  RTSA  RTS (wire A)  F 
5  CTSA  CTS (wire A)  – 
6  DSRA  DSR (wire A)  H 
7 SG Signal Ground  B 
8  DCDA  DCD (wire A)  C 










