iPECS-MG
Hardware Description and Installation Manual Issue 1.1
38
5.2.8 DSIU (Digital and Single Line Interface Unit) Wiring
The DSIU is included on the MPB and provides six (6) Digital Terminal (DKT-1 to 6) ports and
six (6) Single Line (SLT 1 to 6) ports. The DSIU SLT ports support FSK (ITU-T V.23 or Bell
202) or DTMF (ITU-T Q.23) Caller ID to the SLT. The SLT ports provide the -48 VDC source,
current limited to 20 mA, to operate the SLT, and support Message Wait Indication, DTMF or
Pulse Dial, Polarity reversal, sinusoidal ring generator, and GR-909 Line Testing. The SLT and
DKT ports of the DSIU are terminated in RJ45 connectors located in the front panel of the
board. Note the DSIU is NOT field replaceable.
Table 5.2.8-1 RJ45 Pin Assignment, DKT 1 to 6 Connectors
CONNECTOR PIN SIGNAL NAME
RJ45 1,2,3 Not used
4 DKT-T
5 DKT-R
6,7,8 Not used
Table 5.2.8-2 RJ45 Pin Assignment, SLT 1 to 6 Connectors
CONNECTOR PIN SIGNAL NAME
RJ45 1,2,3 Not used
4 SLT-T
5 SLT-R
6,7,8 Not used
Referring to the pin-out charts above,
Wire the DKT and SLT ports of the DSIU to the termination point of the appropriate
DKT or SLT. For information on terminal wiring, refer to section 6.
Tag or number wiring for maintenance
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