Comtech EF Data CDM-625A, Installation And Operation Manual

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CDM-625A Advanced Satellite Modem MN-CDM625A
Rear Panel Connectors and Pinouts Revision 4
3–10
3.2.2.2.3 Quad E1 Operation via the Balanced G.703 / Aux G.703
Connectors
Each adapter cable option provides for two of the four ports of the Quad E1
interface. If all four ports of Quad E1 are needed, the user will need to obtain a
quantity of (2X) of any adapter option.
For Quad E1 operation, optional Comtech EF Data cabling accessories may be purchased from
Comtech EF Data to adapt the Balanced G.703 or Auxiliary G.703 connectors as follows:
Figure CEFD Part No. Converts (1) 9-pin Type ‘D’ Connector (DB-9F) to:
3-5
CA-0000163
(2) DB-15F connections – see Table 3-5 for the connector pinout
3-6
CA-0000164
(2) RJ-48 F connections – see Table 3-6 for the connector pinout
3-7
KT-0000122 or KT-
0020570
(2) BNC 75Ω BNC-F connections – see Table 3-7 for the connector pinout
3.2.2.2.3.1 CA-0000163 Adapter Cable
Figure 3-5. CA-0000163 Adapter Cable (DB-9M

(2X) DB-15F)
Table 3-5. CA-0000163 Connector Pinouts
Table ordered by Signal Function
Signal Function
Connector
Twisted
Pair
P1 J1 J2
Port 1 or 3 Tx In (+) 5 9 ––
X
Port 1 or 3 Tx In (–) 9
1 ––
Port 1 or 3 Rx In (+) 4
11 ––
X
Port 1 or 3 Rx In (–) 8
3 ––
Port 2 or 4 Tx In (+) 7
–– 9
X
Port 2 of 4 Tx In (–) 2 –– 1
Port 2 or 4 Rx In (+) 6
–– 11
X
Port 2 or 4 Rx In (–) 1 –– 3
GND 3
2 2 ––