(4) Power supply
(5) Rear panel
Installing and removing a VPM module
The VPM module can perform voice traffic compression/decompression, echo cancellation (EC), and
comfortable noise generation (CNG). The VPM modules fall into the following types:
•
8-channel VPM (RT-VPM8)
•
16-channel VPM (RT-VPM16)
•
24-channel VPM (RT-VPM24)
•
32-channel VPM (RT-VPM32)
Figure 49
VPM module
Installing a VPM module
To install a VPM module:
1.
Align the golden finger of the VPM module with the VPM module slot on the motherboard of the
router. Insert the VPM module into the slot at a 45-degree angle.
2.
Tilt the VPM module up to the vertical position until you hear a click. This click indicates the VPM
module is firmly inserted in the slot.
Figure 50
Install a VPM module
Removing a VPM module
To remove a VPM module:
1.
Press down and pull the release latches away from the VPM module at both ends to separate the
VPM module from the release latches.
2.
Remove the VPM module, and keep the VPM module.
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