Comtech EF Data CRS-150 - Manual (Page 33)

CRS-150 1:1 Redundancy Switch Revision 2
Connector Pinouts MN/CRS150.IOM
3–7
3.2.2.4.2 Rx and Tx (Unbalanced) G.703 Connectors, 75Ω BNC
Two 75 Ω BNC female connectors are provided for unbalanced operation at the
G.703 data rates of E1 (2.048 Mbps), T2 (6.312 Mbps), or E2 (8448 kbps).
BNC Connector Description Direction
Rx G.703 Rx G.703 (Unbalanced E1) Out
Tx G.703 Tx G.703 (Unbalanced E1) In
3.2.2.4.3 IDI, DDO Connectors, 75Ω BNC
Two female BNC 75 Ω connectors are provided for Drop and Insert (D&I)
unbalanced operation at the G.703 data rate of E1 (2.048 Mbps). These are the
Insert Data In (IDI) and Drop Data Out (DDO) ports.
BNC Connector Description Direction
IDI Insert Data Input In
DDO Drop Data Output Out
Another function of these connectors is for auxiliary G.703 data paths operating at 512, 1024, and
2048 kbps. When these rates are selected, the IDI port is the TX terrestrial G.703 input and the
DDO port is the RX G.703 output.