Instruction manual

GLOSSARY
G
Ground-Start Trunk
On outgoing calls, the system transmits a request for services to the distant switching
system by grounding the trunk ring lead. When the distant system is ready to receive the
digits of the called number, that system grounds the trunk tip lead. When the system
detects this ground, the digits are sent. (Tip and ring are common nomenclature to dif-
ferentiate between ground-start trunk leads.) On incoming calls, detection of ground on
the ring lead is sufficient to cause the call to route to a predetermined destination, nor-
mally the system attendant group. No digits are received.
H
Handshaking Logic
A format used to initiate a data connection between two data module devices.
Home Numbering Plan Area Code (HNPA)
The local area code. The area code does not have to be dialed to call numbers within
the local geographical area.
I
Immediate-Start Tie Trunk
After establishing a connection with the distant switching system for an outgoing call, the
system waits a nominal 65 milliseconds before sending the digits of the called number.
This allows time for the distant system to prepare to receive the digits. Similarly, on an
incoming call, the system has less than 65 milliseconds to prepare to receive the digits.
Information Exchange
The exchange of data between users of two different systems (DEFINITY G1 and host
computer) over a local area network.
In-Use Lamp
A red lamp on a multi-appearance voice terminal that lights to show which call appear-
ance will be selected when the handset is lifted or which call appearance is active when a
user is off-hook.
Intercept Tone
An alternating high and low tone; indicates a dialing error or denial of the service
requested.
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