Primary Group (T1/E1) Interface Cable; Figure 3-12 Utp Cable (Cat-5); Table 3-4 Pinout For Gr2000-B 10Base-T/100Base-Tx Interface - Hitachi GR2000-B Series Installation Manual

Hitachi Gigabit Router GR2000-B Series Installation Guide
3.2.7

Primary Group (T1/E1) Interface Cable

The boundary with the network is the router's connector. The maximum length of
this cable should be 1.8 km or less.
Figure 3-12 and Table 3-4 below show a diagram of the primary group (T1/E1)
interface cable and the pin arrangement, respectively.
RJ45

Figure 3-12 UTP Cable (CAT-5)

Table 3-4
Pin No. Specification (GR2000 Side)
1 Receive (+) (A)
2 Receive (-) (a)
3 Unused
4 Transmit (+) (B)
5 Transmit (-) (b)
6 Unused
7 Unused
8 Unused
Note: Because the interface uses differential, twisted pairs of wires, make (A) and (a), (B) and (b into a
pairs. The other pins can be connected to one another without particular regard, or may be left open.
3-10
Pinout for GR2000-B 10BASE-T/100BASE-TX Interface
RJ45
Specification (DSU Side)
Transmit (+) (A)
Transmit (-) (a)
Unused
Receive (+) (B)
Receive (b) (b)
Unused
Unused
Unused
GR2K-GA-0007
Rev. 5.00