Comtech EF Data RCS11 - Manual (Page 78)

RCS11 1:1 Redundancy Switch Connector Pinouts
MN-RCS11 – Revision 9 5–20
5.9 High-Speed Serial Interface (HSSI) & ASI or G703 Interface (Optional)
This interface supports HSSI and the G703 or ASI interface. The RCS11 must be configured with
either ASI or G703 when ordering. This interface is supported by the DMD20, DMD50, DD240XR
and DM240XR Modem.
5.9.1 HSSI TERR DATA (J8)
The HSSI (High-Speed Serial Interface) (J6) complies with the HSSI Functional and Electrical
Specifications. The physical interface is a 50-Pin SCSI-2 Type Connector. Electrical levels are
ECL. Gapped clocking not supported. The pinouts for this interface are listed in Table 5-24.
Table 5-24. J9 – HSSI (High-Speed Serial Interface) 50-Pin Connector
Pin No. (+) Pin No. (–) Signal Name Description Direction
1 26 SG Signal Ground ---
2 27 RT Receive Timing Output
3 28 CA DCE Available Output
4 29 RD Receive Data Output
6 31 ST Send Timing (SCT) Output
7 32 SG Signal Ground ---
8 33 TA DTE Available Input
9 34 TT Terminal Timing (SCTE) Input
11 36 SD Send Data Input
13 38 SG Signal Ground ---
14 - 18 39 – 43 5 Ancillary to
DCE
Reserved Input
19 44 SG Signal Ground ---
20 - 23 45 - 48 4 Ancillary
from DCE
Reserved Output
24 49 TM Test Mode Output
5.9.2 ASI or G703 Data Interface
5.9.2.1 TXA ASI or G703 (J15)
Modem A TX Data Port is an ASI or G703 Unbalanced 75-Ohm Female BNC Connector. RCS11
Switch must be ordered supporting either ASI or G703 interface.
5.9.2.2 TERR TX ASI or G703 (J16)
The TERR TX User Data Port is an ASI or G703 Unbalanced 75-Ohm Female BNC Connector.
RCS11 Switch must be ordered supporting either ASI or G703 interface.