AT&T MERLIN LEGEND Release 4.0 Feature Reference page 75

Feature Reference
Some central offices still require the prefix 1 for dialing certain exchanges. If
1 + 7-Digit Dialing Requirements option is programmed as Within Area Code,
the system expects either dial timeout or a
a 1 + 7-digit or a 1 + 10-digit number has been dialed. (This may result in
delays while the user waits for timeout.) To avoid timeout delays, 1 + 7-Digit
Dialing Requirements can be programmed as Not Within Area Code, but all
exchanges requiring a system-prefixed 1 must be listed in a Local Exchange
Table, and the 1 must be specified as a character to be prefixed. In this case,
users must not dial the
Area Codes 800 and 900 are treated as entries in programmable tables. They
may be programmed as either area codes or as exchanges.
Mode Differences
ARS is available only in Hybrid/PBX mode.
Feature Interactions
Account Code Entry
Allowed Lists
Authorization Code
Auto Dial
Automatic
Maintenance Busy
Callback
before dialing those exchanges.
When ARS is used on the system, an account code can be entered
before or after dialing the telephone number.
ARS prevents people with restricted extensions from dialing numbers
that are not included on an Allowed List. Emergency numbers must be
included on an Allowed List it they are to be called from restricted
extensions.
An authorization code can be entered before dialing the ARS access
code. After dialing the ARS access code, you can only enter an
authorization code if a Feature button or programmed Authorization
Code button is used.
The ARS code can be programmed before a telephone number on an
Auto Dial button.
If ARS is used to make an outside call, the system selects another trunk
in the pool when the first trunk is in the maintenance-busy state.
When a call is made using ARS and all possible trunk routes are busy,
the call can be queued only for the first route in the pattern. However, if
the FRL for the extension does not allow the call to be made over the
route, the call is not queued.
If a voice call is queued for callback on a digital trunk pool, it can get
stuck in an infinite loop of queuing. The caller hears a continuous stutter
tone and cannot get rid of it. To avoid this situation, be certain to
correctly program the voice and/or data capabilities of pools of PRI and
BRI facilities in the ARS tables.
(end of dialing) to indicate whether
Automatic Route Selection
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