Note: If the Trunk scroll bar displays all available trunks, the scroll bar buttons are
unavailable.
After you have selected a trunk, the following is displayed:
• The read-only 'Module ID' field displays the module number to which the trunk
belongs.
• The read-only 'Trunk ID' field displays the selected trunk number.
• The read-only ‘Trunk Configuration State’ displays the state of the trunk ('Active'
or 'Inactive').
• The displayed parameters pertain to the selected trunk only.
3. Click the Stop Trunk button (located at the bottom of the page) to take the trunk
out of service so that you can configure the currently grayed out (unavailable)
parameters. (Skip this step if you want to configure parameters that are available
when the trunk is active). The stopped trunk is indicated by the following:
• The ‘Trunk Configuration State’ field displays ‘Inactive’.
• The Stop Trunk button is replaced by the Apply Trunk Settings button.
When all trunks are stopped, the Apply to All Trunks button also appears.
• All the parameters are available and can be modified.
4. Configure the trunk parameters as required.
5. Click the Apply Trunk Settings button to apply the changes to the selected trunk (or
click Apply to All Trunks to apply the changes to all trunks); the Stop Trunk button
replaces Apply Trunk Settings and the ‘Trunk Configuration State’ displays 'Active'.
6. To save the changes to flash memory, see 'Saving Configuration' on page 624.
7. To reset the device, see 'Resetting the Device' on page 621.
Notes:
• If the ‘Protocol Type’ field displays 'NONE' (i.e., no protocol type is
selected) and no other trunks have been configured, after selecting a PRI
protocol type, you must reset the device.
• The displayed parameters depend on the protocol selected.
• All PRI trunks of the device must be of the same line type (i.e., E1 or T1).
However, different variants of the same line type can be configured on
different trunks, for example, E1 Euro ISDN and E1 CAS (subject to the
constraints in the device's Release Notes).
• BRI trunks can operate with E1 or T1 trunks.
• If the protocol type is CAS, you can assign or modify a dial plan (in the
'Dial Plan' field) and perform this without stopping the trunk.
• If the trunk can’t be stopped because it provides the device’s clock
(assuming the device is synchronized with the E1/T1 clock), assign a
different E1/T1 trunk to provide the device’s clock or enable ‘TDM Bus
PSTN Auto Clock’ in the TDM Bus Settings page (see 'TDM and Timing'
on page 280).
• To delete a previously configured trunk, set the parameter 'Protocol
Type' to 'None'.
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