3Com S330 manual VCM Channel Loopback Menu

184CHAPTER 5: PATHBUILDER S330 DIAGNOSTICS AND PERFORMANCE STATISTICS

The following prompt appears:

Enter Channel (1-8):

3Enter the number of the channel for which you want to set a loopback to open the VCM Channel Loopback menu for that channel. Figure 144 shows the VCM T1-DSX Channel Loopback menu. The VCM E1 Channel Loopback menu is the same.

Figure 144 VCM Channel Loopback Menu

4Select [1] Set Loopback. A prompt appears, listing the available types of channel loopback.

5Enter 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.

6Select [2] Apply Setting to Channel(s).

The following prompt appears:

Enter Channel (1-8):

7Enter 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: 4-6), or a list of channels separated by commas (for example: 4,5,6).