Cabletron Systems CSX400 - Manual (Page 72)

CSX WAN Configuration
4-8 T1 Port Configuration
clock source is used. You should set the Clock Source at your device according to
your WAN service providerÕs instructions.
Configuring the T1 Port
1. To change the Line Code, click on the selection box and a pull down menu
will appear. Select B8ZS or AMI as appropriate, and release the mouse
button. The new configuration will appear in the text box.
2. To change the Circuit Id, highlight the current entry in the text field, and type
a new value in the text box.
3. Click on to save the changes or to go back to the original
configuration.
The new T1 interface conÞguration will be displayed in the window. Remember,
these conÞguration changes are for reference purposes only, and they will not be
physically set at the device.
Using the Fractional Table
The Fractional Table graphically represents how your Fractional T1 line is divided
for use among the virtual interfaces. The Fractional Table allows you to map
timeslots on the T1 line to an individual interface or a group of interfaces. The
timeslots should be used according to the mapping provided by your wide area
carrier.
Figure 4-4 illustrates a sample conÞguration of a T1 connection that was set
according to the mapping provided by the WAN service provider.
Figure 4-4. Example Fractional Table ConÞguration
To conÞgure the Fractional Table:
1. Type the interface number into the boxes of the timeslots your wide area
carrier has assigned. In the preceding illustration, the wide area carrier
assigned timeslots 1-12 for use on interface 2, and 13-24 for interface 4.
2. When you are done assigning the timeslots, click on .
The Fractional Table will now display the timeslots assigned to your interfaces.