Installation guide

Main Processing Board 4-13
Chapter 4: Board Installation
MBX IP Hardware & Installation Guide
MODU (Modem Interface Unit)
The optional MODU should be installed on the MODU connectors (CN4, CN5) of the
MPB100/MPB300, and provides an analog modem connection. It supports Bell, ITU-T, V.34,
V.32BIS, V.90 Protocol at a speed rate of 300bps up to 33Kbps, and automatic rate negotiation.
CONNECTOR PIN
NUMBER
RJ21
PIN
DTIB12/24C
CONNECTOR
DTIB12/24C
DESIGNATION
PORT
NO
REMARK
PAIR PIN
RJ21 18
43
18 18
43
VT-18
VR-18
18 -
19
44
19 19
44
VT-19
VR-19
19
20
45
20 20
45
VT-20
VR-20
20
21
46
21 21
46
VT-21
VR-21
21
22
47
22 22
47
VT-22
VR-22
22
23
48
23 23
48
VT-23
VR-23
23
24
49
24 24
49
VT-24
VR-24
24
Release 1.7
April 2012