AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 63

Trunks
Rotary Dial Trunks
Toll Prefix Dialing Requirements (Toll Type)
3-8 Trunk Options
Planning Form Instructions
At the top of Form 2c, under the "Loop-Start Reliable Disconnect" heading
choose one of the following:
Check "No" if the loop-start trunks have an unreliable disconnect signal.
Check "Yes" if loop-start trunks have a reliable disconnect signal.
The system is factory set to generate touch-tone signals when users dial outside
calls. Identify any rotary dial trunks that are connected to the system so that
rotary dial signals can be used for these trunks.
Note: Touch-tone, single-line telephone users cannot make calls using rotary
dial trunks.
Check with your local or long-distance telephone company to determine which,
if any, trunks connected to the system are rotary dial trunks.
Planning Form Instructions
In the "Outmode Rotary Dial" column on Form 2c, check "Yes" to show rotary
dial trunks or "No" to show touch-tone.
Toll Type allows the system to classify calls as either local or toll, based on the
number dialed by the user. Normally, people have to dial a toll prefix (1 or O)
before dialing the area code and telephone number for atoll call. In some areas
this is not necessary; dialing a prefix depends on local telephone company
requirements and the type of trunk used.
Find out from your local telephone company which trunks require a toll prefix.
This information is used by the system when a toll call is placed by a telephone
or data terminal on ground-start or loop-start trunks.
Note: The Toll Type feature does not apply to tie trunks.
Planning Form Instructions
In the "Toll Prefix Not Needed for LD" column on Form 2c, check "Yes" next
to any trunks on which people do not need to dial a prefix when placing toll
c a l l s .