Hitachi GR2000 manual Carrier e.g., NTT facility, Customer facility

Pin No. Specifications

1Unused

2Unused

3Transmit (+)

4Receive (+)

5Receive (+)

6Transmit (-)

7Unused

8Unused

Note: Because of being a twisted pair cable, make pairs of (A) and (a), and (B) and (b) using the ab pin assignment. For pins other than these, do not care about the pairing, either unconnected or connected can be accepted.

Carrier (e.g., NTT) facility

INS Net 64 or SD-I64

Customer facility

Customer setup length L1 (bus connection with up to 8 modular rosettes)

DSU Flat metal cable (4-wire)