Nortel Networks BCM1000 manual Chapter Setting media bay module DIP switches

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Chapter 7

Setting media bay module DIP switches

Before you install a media bay module, assign switch settings for the media bay module. These settings determine which line numbers (trunks) or DNs (extensions) the equipment connected to the module will have access to. The DIP switches are located on the back or underside of the media bay module.

Note: Fiber Expansion Module (FEM) switches

The switches on the fiber expansion module (FEM) do not work in the same way as those on the other media bay modules. On the FEM, the switches turn the fiber ports on and off. For information about setting the switches on an FEM, refer to “FEM switch settings” on page 106.

Start from the list of modules you chose in Chapter 4, “Selecting the media bay modules for your system,” on page 57.

After you determine which DS30 blocks you want to use, and how much DS30 bus capacity each module requires, you determine the location of the modules on the DS30 array. From that information, you choose switch settings for each module. These settings are then set on the module DIP switches.

This chapter describes the latter process of positioning your modules in the DS30 hierarchy and determining and setting the DIP switch settings on the module.

Rules for assigning DS30 bus blocks and offsets

Media bay modules are assigned to DS30 bus blocks in a specific hierarchical manner. This section describes the preferred order of positioning for each type of module.

Notes about assigning modules

The following are some general notes about assigning modules:

•If you chose a 3/5 DS30 split for your system, DS30 07 cannot be used by any module. For modules that require two DS30 buses, this means that you cannot set the DIP switches to DS30 06 for those modules, because the second level of lines would fall into 07, and would not be accessible. Refer to Figure 37 on page 85.

Refer to “Understanding DS30 bus blocks” on page 61 for more information about 2/6 and 3/5 DS30 splits.

•DSM 32 modules require two DS30 bus numbers. When you assign the first DS30 bus number to a DSM 32, the module automatically adds the next DS30 bus. For example, if you assign DS30 02 to a DSM 32, it uses DS30 02 and 03. However, you cannot choose DS30 07 for the

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