3Com 3C10402B, Руководство администратора

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Configuring and Managing Digital Line Cards 169
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