# Dialogic® MD1 Mini RJ-21 interface

A Dialogic® MD1 Mini RJ-21 interface is a high-density, modular interface that provides up to 12 RJ-45 ports through a single cable. The following illustration shows the Dialogic® MD1 Mini RJ-21 interface:

## Pin assignments

Dialogic® MD1 Mini RJ-21 interfaces use the following pin assignments:

Trunks | Transmit to network pin assignments | Receive from network pin assignments
Tip | Ring | Tip | Ring
1 | 1 | 2 | 13 | 14
2 | 3 | 4 | 15 | 16
3 | 25 | 26 | 37 | 38
4 | 27 | 28 | 39 | 40
5 | 5 | 6 | 17 | 18
6 | 7 | 8 | 19 | 20
7 | 29 | 30 | 41 | 42
8 | 31 | 32 | 43 | 44
Not used | 9 and 10 21 and 22 11 and 12 23 and 24 33 and 34 45 and 46 35 and 36 47 and 48 49 and 50