Some T1 equipment uses DA-15 connectors and requires a DA-15 to RJ-48 cable, which is available from the equipment manufacturer. The female DA-15 pinout is shown in Figure E-8, and its pinout is in Table E-5.
Figure E-8. Female DA-15 connector
Table E-5. DA-15 pinout for T1
Pin numbers
Purpose
1
Transmit to telco, ring
9
Transmit to telco, tip
3
Receive from telco, ring
11
Receive from telco, tip
2 and 4
Grounding
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