Nortel Networks BCM200, 400 4.0 To determine bus requirements, Matching MBMs to DS30 bus capacity

Chapter 8 Installing a media bay module (MBM) 113

Figure 67 Space requirements for special MBMs

Combination and specialized media bay modules

4x16 module	DDIM module
2 DS30 buses/	2 DS30 buses/
offset set to 0, 1, 2, or 3	offset set to 0

1 offset of

1 full DS30

for lines

1 full DS30

for telephone

and equipment

connections

1/2 DS30 for

the stations

1 full DS30 for DTM module

1 full DS30 for data

Note: The FEM module requires a DS30 bus for each port that is active. If all ports are active, no other modules can be added to the system.

To determine bus requirements

1Make a list of MBMs and the space requirements for each MBM you chose. Refer to the following table.

Table 27 Matching MBMs to DS30 bus capacity

DS30 split 2/6 (default) _____ 3/5 (extra IP lines) _____

Type of module

Number required DS30s/offsets required

2Set the bus numbers and offsets on the MBM DIP switches. Refer to “Determining MBM DIP switch settings” on page 116. Note that you assign trunk MBMs starting from the bottom DS30, and you assign station MBMs starting from the top DS30.

3Install the MBMs into the BCM main unit or expansion unit. Refer to “Installing a media bay module (MBM)” on page 105.

BCM200/400 4.0 Installation and Maintenance Guide