3Com VCX V7122 User Manual page 71

3
To modify the selected trunk's parameters, click the Stop Trunk button; the trunk is
stopped, the status of the parameter 'Trunk Configuration State' changes to 'Non Active',
the parameters are no longer grayed and can be modified and the Apply Trunk
Settings button appears at the bottom of the screen.
When all trunks are stopped, the Apply to all Trunks button also appears at the bottom
of the screen.
If the trunk can't be stopped because it provides the gateway's clock (assuming
the VCX V7122 is synchronized with the E1/T1 clock), assign a different E1/T1
trunk to provide the gateway's clock or enable 'TDM Bus PSTN Auto Clock' on the
TDM Bus Settings screen.
To assign a different E1/T1 trunk that provides the gateway's clock, access the
'TDM Bus Setting' screen and change the 'TDM Bus Local Reference' number to
any other trunk number (this operation can be performed on-the-fly).
4 Select the 'Protocol Type' you use. Note that different trunks can be defined with different
protocols (CAS or ISDN variants) on the same gateway (subject to the constraints in the
VCX V7122 Release Notes).
When modifying the 'Protocol Type' field, the menu is automatically updated
according to the selected protocol (ISDN, CAS or Transparent). Additional
parameters are appropriate to the selected protocol type.
5
Modify the relevant trunk configuration parameters according to your requirements.
6
To configure the different behavior bits: either enter the exact hexadecimal value of the
bits in the field to the right of the relevant behavior parameter, or directly configure each
bit field by completing the following steps:
Click the arrow button (-->) to the right of the relevant behavior parameter; a new window
appears.
Modify each bit field according to your requirements.
Click the Submit button to save your changes.
Click the Close Window button.
7
After modifying the parameters:
To apply the changes to the selected trunk only, click the Apply Trunk Settings button.
To apply the changes to all the trunks, click the Apply to all Trunks button.
The screen is refreshed, parameters become read-only (indicated by being grayed). The
Stop Trunk button appears at the bottom of the screen.
8
To save the changes so they are available after a power fail, see
page 88.
3Com VCX V7122 SIP VoIP Gateway User Manual
Blue
Orange
AIS Alarm
D-channel Alarm
(ISDN only)
Save Configuration on
71