3Com Router 3000 Series - Page 29

Figure 15 120-ohm 4E1 Conversion Cable
Figure 16 75-Ohm 4E1 Conversion Cable
Tabl e 20 lists E1 cable pinouts.
Tabl e 20 E1 Cable Pinouts
DB15
BNC (75-ohm coaxial
cable)
RJ-45 (120-ohm twisted pair)
9 Tx Tip Tx Tip 1 Tx Tip
2 Tx Ring Tx Ring 2 Tx Ring
10 Tx Shield - 3 Tx Shield
8 Rx Tip Rx Tip 4 Rx Tip
3Com Router Release Notes for V1.20
29