Lucent Technologies MERLIN LEGEND Release 7.0 System Planning Manual page 248

MERLIN LEGEND Communications System Release 7.0
System Planning 555-670-112
4 Features
System Features
!
SECURITY ALERT:
In some instances, after dialing a star code, the central office responds with
a second dial tone as a prompt to enter additional digits. If a caller begins
dialing additional digits before the second dial tone, system restrictions may
be bypassed and a restricted call may be routed. Careful administration of
the Second Dial Tone Timer prevents the caller from bypassing call
restrictions in this manner. Refer to the
follow for information.
If foreign exchange (FX) or tie trunks are connected to the system, you can enter
the exchange in the Allowed List to allow people with restricted telephones to dial
numbers to the area code for the FX or tie trunk. As you design each list, consider
which numbers need to be called by specific groups of restricted users. In a
private network, restricted telephones can dial non-local UDP extensions. The
non-local extension ranges do not need to be put on an Allowed List.
Planning Form Instructions
On Form 6e:
1. Write the name of the list in the space next to the list number.
2. Write the allowed area codes, exchanges, and/or star codes in the spaces
provided (a maximum of 10 entries for each list).
3. If star codes are included in the Allowed List, the Second Dial Tone Timer
must also be programmed. This timer induces a time delay before the user
may dial additional digits after a star code, and is activated once a star
code has been accepted. The dialing of any digits before this timer expires
is treated as if normal restrictions have been violated and the call is not
completed. The timer may be set from 0 to 5000 ms in increments of
200 ms. The factory setting is 0. On Form 1 (page 2), System Planning,
write the desired setting for the Second Dial Tone Timer.
4. Write the extension numbers of the telephones that need access to the list
in the Allow to Ext. Nos. column (see Form 2a).
5. If you planned Remote Access with restrictions and want to permit Allowed
List numbers to be called by remote access users, then do the following:
a.
b.
NOTE:
Allowed List Class-of-Restriction assignments apply to all remote
access users and cannot be assigned on an individual basis.
On Form 3a (page 3), Incoming Trunks: Remote Access, in the
Class of Restrictions without Barrier Codes section, write the list
numbers under the Allowed List Access heading for either or both tie
and non-tie trunks.
On all copies of Form 3a (page 4), Class of Restriction with Barrier
Codes, write the list numbers under the Allowed List Access
heading for each barrier code assigned.
''Planning Form Instructions''
Issue 1
April 1999
4-50
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