3com MSR 20 Manual Do Utilizador
VCPM Module
231
Installing/Removing
SNDE Card
SNDE card should be installed on the main board and the ESM slot on the MSCA
card of MSR 20/30 router. The board that provides ESM slots is referred to
hereafter as mother board. Suppose the mother board is uninstalled and put on
the workbench.
card of MSR 20/30 router. The board that provides ESM slots is referred to
hereafter as mother board. Suppose the mother board is uninstalled and put on
the workbench.
Removing SNDE card
Follow these steps to remove the SNDE card:
Step 1: Remove the fastening screws on the SNDE card.
Step 2: Remove the SNDE card from the mother board. Do not overexert when
removing the SNDE card because the connector of the daughter board is still on
the mother board.
removing the SNDE card because the connector of the daughter board is still on
the mother board.
Step 3: If no SNDE card is to be installed, for an MSCA card, remove the four
screws fastening the metal standoff on the daughter board and take the four
metal standoffs. For other mother boards, remove the four metal standoffs.
screws fastening the metal standoff on the daughter board and take the four
metal standoffs. For other mother boards, remove the four metal standoffs.
Installing SNDE card
Follow these steps to install SNDE card:
Step 1: Confirm the correct position of the SNDE card on the
Step 2: For MSCA card, fasten the four metal standoffs which fasten and support
SNDE card. For other mother boards, fasten the four metal standoffs on the
mother board. Step 3: Install the SNDE card on the mother board and fasten it
with four screws. During installation, align the two connectors under the daughter
board to the connectors on the main board to avoid damage to the connectors.
SNDE card. For other mother boards, fasten the four metal standoffs on the
mother board. Step 3: Install the SNDE card on the mother board and fasten it
with four screws. During installation, align the two connectors under the daughter
board to the connectors on the main board to avoid damage to the connectors.
c
CAUTION: You should connect a cable to the port with the correct mark.
Misplugging is prone to impair the interface module and even damage the router.
Misplugging is prone to impair the interface module and even damage the router.
VCPM Module
Introduction
VCPM, voice co-processing module, provides transmission channel between DSP
strip and system memory for voice data, thus implementing TDM HW exchange
for each PCM data voice channel.
strip and system memory for voice data, thus implementing TDM HW exchange
for each PCM data voice channel.
VCPM module is a required module for voice communications of routers.
Table 174 Description of the LEDs on the SNDE
LED Description
ESMx
Green: SNDE card is in the slot and is operating normally.
Yellow: SNDE card is in the slot but cannot be accessed by the router.
Note:
x means the number of the slot the ESM LED is in.