User manual

T1/E1 and Digital Voice ModulesPassport 4400 Hardware Installation Manual
9-6
Digital Voice Expansion Module (DVEM)
The Digital Voice Expansion Module houses a maximum of 12 Digital Voice
Modules (DVMs). It serves as an extension to the 6 DVMs mounted on the
associated T1/E1 Voice Module.
Physical Description
TheDigital VoiceExpansion Module has 12receptacles arranged in three groups
of four to house 12 Digital Voice Modules. Toward the rear is the module switch
groupusedforconfiguringthephysicallocationofthemodulewithinthePassport
4400 device.
Figure 9-8. Digital Voice Expansion Module
On the right front are 13 indicators. At the center and on the left side are three
feed-through stacking connectors used to connect the Digital Voice Expansion
Module to the T1/E1 Voice Module below it and to any expansion module above it.
Note: The Digital Voice Expansion Module must be physically installed
directly on top of the T1/E1 Voice Module or another Digital
Expansion Module.
Rear
(Back Panel)
Front View
Module
Switch Group
Receptacles (12) for
Digital Voice Modules
Stacking Connectors
Indicators
Power
Connector