Vertical IP8024 Installation Guide Page 50

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Main Processing Board 4-8
Chapter 4: Board Installation
MBX IP Hardware & Installation Guide
DSIU (Digital and Single Line Interface Unit)
The DSIU is included by default on the MPB100/300, and provides 6 Digital Terminal (DKT)
ports and 6 Single Line analog (SLT) ports with FSK (ITU-T V.23 or Bell 202) or DTMF (ITU-T
Q.23) Caller ID function. The 6 SLT ports support the Message Wait Indication, DTMF or Pulse
Dial receive, Polarity reversal, sinusoidal ringing generator, -48V DC feeding voltage, 20mA
Current Limitation and GR-909 Line Testing. The connection between the DSIU and terminal is
connected through RJ21 Modular Jacks.
NOTE:
Caller ID signal can be either DTMF or FSK based on the country code entered in
the system database.
Dialing Type (DTMF or DP) and Message Wait Indication (MWI) function is
determined by the selected admin value.
Pin Assignment, MJ1 (DKT Only)
CONNECTOR PIN
NUMBER
RJ21
PIN
DTIB12/24C
CONNECTOR
DTIB12/24C
DESIGNATION
PORT
NO
REMARK
PAIR PIN
RJ21 1
26
1 1
26
VT-1
VR-1
1 BL:BLUE
BK:BLACK
BN:BROWN
OR:ORANGE
WH:WHITE
GN:GREEN
SL: SILVER
VI:VIOLET
RD:RED
YL:YELLOW
2
27
2 2
27
VT-2
VR-2
2
3
28
3 3
28
VT-3
VR-3
3
4
29
4 4
29
VT-4
VR-4
4
5
30
5 5
30
VT-5
VR-5
5
6
31
6 6
31
VT-6
VR-6
6
7
32
77
32
VT-7
VR-7
7
8
33
88
33
VT-8
VR-8
8
9
34
99
34
VT-9
VR-9
9
10
35
10 10
35
VT-10
VR-10
10
11
36
11 11
36
VT-11
VR-11
11
Release 1.7
April 2012
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