For T1 Digital Line Card groups, the fields in the Modify window contain
default values. No default values are assumed for Called Party Digits or
Calling Party Digits.
3 To modify the name of the group, enter a new name in the Group Name
field. You can use alphanumeric characters, hyphens, and underscores.
The maximum name length is 30 characters.
4 To prohibit call transfers between trunk lines, select Restricted (the
default value) from the Trunk to Trunk drop-down list. Otherwise, select
Unrestricted.
CAUTION: If you select Unrestricted, telephone users can transfer
incoming calls to outgoing trunks. 3Com does not recommend this
setting because it enables the possibility of toll fraud.
5 For T1 Digital Line Cards, modify the Wink Wait value:
a Select Wink Wait from the Timer Values list.
b Type 3000 in the New Value field.
c Click Apply.
d Ask your telephone service provider to set their Wink Wait value to
3000 msec.
6 For T1 Digital Line Cards, modify the Guard value:
a Select Guard from the Timer Values list.
b Type 2200 in the New Value field.
c Click Apply.
d Ask your telephone service provider to set their Guard value to
2200 msec.
7 Enable the On Line check box.
8 Verify that 500 (the default) is in each of the four AutoExt fields.
9 Click OK.
Verifying Group Membership
To verify that all channels are in the member list:
1 Click the appropriate link:
PSTN Gateway Configuration > IT1 Groups
■
PSTN Gateway Configuration > ISDN PRI Groups
■
Configuring and Managing Digital Line Cards
169