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Telephony Hardware Selection and Settings 333
Installation and Maintenance Guide
Table 56 shows the switch settings for each DS30 bus, and the resulting line assignments.
DDIM switch settings
The DDIM module combines a DTM and a Data Module. The switch setting you choose
determines the DS30 channel assigned to the DTM portion of the DDIM. The Data Module is
automatically assigned the next DS30 channel number.
The DS30 channel you assign to the DDIM determines the line numbers of the T1 line connected
to the DDIM. Table 54 shows the switch settings for each DS30 channel, and the resulting line
assignments.
Table 56 DTM switch settings (E1 and UK PRI)
Select
DS30
bus
Enter these switch settings
To
assign
these
lines
Select
DS30
bus
Enter these switch settings
To
assign
these
lines
123456 123456
2
on on on on on on
211-240 5
on on on on
off off
121-150
3
on on on on on
off
181-210 6
on on on
off
on on
91-120
4
on on on on
off
on
151-180 ***7
on on on
off
on
off
61-90
***If your system is configured with a 3/5 DS30 channel split, DS30 channel 7 is not available.
Table 57 DDIM switch settings
Select
DS30
bus
Enter these switch
settings
To
assign
these
lines
Data
Module
DS30
channel
Select
DS30
bus
Enter these switch
settings
To
assign
these
lines
Data
Module
DS30
channel123456 123456
2
on on on on on on
211-234
3 5
on on on on
off off 121-144
6
3
on on on on on
off 181-204
4 6
on on on
off on on 91-114
7*
4
on on on on
off on 151-174
5 7 **
* If your system is configured with a 3/5 DS30 channel split, you cannot use DS30 channel 6 for the DDIM. When you
use a 3/5 split, DS30 channel 7 is not available for the data module portion of the DDIM.
** You cannot use DS30 channel 7 for the DDIM. If you assign DS30 channel 7, there is no DS30 channel available for
the data module portion of the DDIM.