Altigen AltiContact Manager Version 5.0 Administration Manual page 218

Setting General Trunk Attributes
The Overhead paging feature requires paging equipment to provide
loop start CO trunk characteristics. This option is not supported on
ground start trunks.
The Paging option and the Overhead Paging option (in "Audio
Peripheral Configuration" on page 5-26) are different and independent
of one another. The Overhead Paging option is to set up the audio out
port of the Quantum board for use with the #44 overhead option built
into the system.
The E-911 feature allows a caller to dial 911 without dialing a trunk access
code and allows the 911 caller to be located in a PBX system.
trunk can be selected and reserved for E-911 calls but the customer
must make sure the carrier provides E-911 service in the PRI span. If
CAMA trunks (trunks "dedicated" for Enhanced 911 usage) are
available from the carrier, Triton analog and Quantum analog trunks
can be configured as CAMA trunks to support E-911.
Note: E-911 is not supported by T1 protocol
Important: When accessing an outside number from voice mail, dialing
911 will not go through if only E-911 trunks are available.
• Phone Number - The phone number, without the area code, assigned
to the location. If the wiring changes and a new phone number is
assigned to the location, you must update the information in this field.
• Description - Descriptive information such as the company name for
the assigned Phone Number, or appropriate agency if this trunk
provides 911 access.
• Trunk Dialing Scheme -
— Overlap allows the terminal to omit part of the digits required to
complete a call, while the remaining digits are buffered. Use
Overlap Dialing for analog trunks and for T1 (robbed bit) for best
results.
— En-bloc allows the terminal to include all of the digits required to
complete a call. Use En-bloc Dialing for digital (PRI-ISDN)
trunks.
Note: For IP trunks, use the IP Dialing Table to set the dialing
scheme.
• Trunk Call Predial String - select the Trunk Predial String
checkbox to add digits when the trunk is used.
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Overlap or En-bloc dialing.
Any ISDN PRI