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Nortel Networks 400 4.0 User Manual

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Chapter 8 Installing a media bay module (MBM)
121
BCM200/400 4.0 Installation and Maintenance Guide
4
You are now ready to install the MBMs into the BCM system. Refer to 
 for details.
Assigning line and extension numbers
The switch settings on the MBM determine the line numbers and extension numbers the MBMs 
use. The tables in this section show the correspondence between DS30 numbers, switch settings, 
and the line and extension numbers for each type of MBM. The DS30 number and switch settings 
correspond with 
DTM switch settings
Although DTMs have more than 16 lines, they occupy only one DS30 bus per DTM.
 shows the switch settings for each DS30 bus, and the resulting line assignments.
 shows the switch settings for each DS30 bus, and the resulting line assignments.
Tip: Create a label with the DS30 bus and DIP switch settings. Affix the label to the front 
of the MBM as a quick reference during maintenance activities.
Table 30   DTM switch settings (T1)
Select 
DS30 
bus 
Enter these switch settings
To 
assign 
these 
lines
Select 
DS30 
bus
Enter these switch 
settings
To assign 
these lines
1
2
3
4
5
6
1
2
3
4
5
6
2
on
on
on
on
on
on
211-234
5
on
on on
on
off off
121-144
3
on
on
on
on
on
off
181-204
6
on
on on
off
on on
91-114
4
on
on
on
on
off
on
151-174
***7
on
on on
off
on
off
61-84
***If your system is configured with a 3/5 DS30 split, DS30 bus 7 is not available.
Table 31   DTM switch settings (North American PRI)
Select 
DS30 
bus 
Enter these switch settings
To 
assign 
these 
lines
Select 
DS30 
bus 
Enter these switch settings
To assign 
these 
lines
1
2
3
4
5
6
1
2
3
4
5
6
2
on
on
on
on
on
on
211-233
5
on
on
on
on
off off
121-143
3
on
on
on
on
on
off
181-203
6
on
on
on
off
on
on
91-113
4
on
on
on
on
off
on
151-173
***7
on
on
on
off
on
off
61-83
***If your system is configured with a 3/5 DS30 split, DS30 bus 7 is not available.