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Install Upgrades and FRUs
Release 3.3 187
• One DSP Module (21061/21161) for telecom support
• One Dual FIM Module
• One 64 Channel Echo Canceller
This provides:
• Eight DSP devices for telecom functions
• 30 Voice Mail Ports
• 128 channels of Echo Cancellation
• Four External FIM connections
• Four ASU connections (CIM ports)
The four external FIM connections are for providing connectivity for up to four Peripheral Units
or up to eight NSUs.
Note that there are two T1/E1 links per NSU.
To upgrade a 250 user system to a 700 user system:
1. Remove the cover.
2. Install the new Dual FIM Modules (slot 2).
3. Install the new 21161 DSP Modules (slot 7).
4. Install the 64 Echo Canceller Module (slot 6).
5. Replace the cover.
Note: A second 64-channel Echo Canceller can be added, or the existing 64-channel
Echo Canceller can be replaced by a 128-channel Echo Canceller. If you choose to add
a second Echo Canceller, the controller must be operating on version 3.2 software. The
3.0/3.1 software does not support two 64 echo cancellers.