Setting Vcm Channel Loopbacks - 3Com SuperStack II PathBuilder S330 Reference Manual

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HAPTER ATH UILDER
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IAGNOSTICS AND ERFORMANCE

Setting VCM Channel Loopbacks

To set VCM channel loopbacks:
1 From the VCM Loopback menu, shown earlier in Figure 158, select
[2] Set Channel Loopback. You are prompted to enter a channel number.
2 Enter the number of the channel for which you want to set a loopback to open
the VCM Channel Loopback menu for that channel. Figure 159 shows the VCM
T1-DSX Channel Loopback menu. The VCM E1 Channel Loopback menu is the
same.
Figure 159 VCM Channel Loopback Menu
3 Select [1] Set Loopback. A prompt appears, listing the available types of channel
loopback.
4 Enter the appropriate number to select one of the following types of channel
loopbacks (or no loopback):
PCM Loopback — Loops digital receive to transmit toward the T1 port.
PCM Packet Loopback — Loops coder output to coder input toward the T1 port,
using the DSP channel PCM packet loopback.
Network Packet Loopback — Loops coder input to coder output toward the
ATM network, using the DSP channel network packet loopback.
5 Select [2] Apply Setting to Channel(s).
The following prompt appears:
Enter Channel (1-8):
6 Enter the number(s) of the channel(s) to which you want to apply the settings to
set the specified loopback for those channels. You can enter a single channel, a
range of channels (for example:
(for example: ).
4,5,6
S
TATISTICS
), or a list of channels separated by commas
4-6