AT&T 7200 series, 7500 series Transparent Voice Terminal Features, Alerting-Distinctive Ringing

DISTRIBUTED COMMUNICATIONS SYSTEM (DCS) 6-17

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Transparent Voice Terminal Features

The following voice terminal features operate transparently at voice terminals attached to nodes within a DCS cluster. (See table 6-4for a list of transparent voice terminal features and the communications systems from which you can expect transparency.)

Table 6-4.Availability of Transparent Voice Terminal Features

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⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜ DIMENSION

⎜

SYSTEM 85

⎜

SYSTEM 75

⎜

DEFINITY ⎜

⎜

⎜

PBX

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

FEATURE

⎜

FP8

⎜ R1

R2

⎜

R1

⎜

G1

G2

⎜

⎜

⎜

Iss 3

⎜

-

⎜

V1

⎜

⎜

⎜

⎜

V1

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

_

⎜ V2

⎜ V3

⎜ V4

⎜ V2

⎜ V3

⎜ Alpha Display

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜ Auto Callback

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜ Call Coverage Tone

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜ Call Forward

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜

All Calls

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜ Call Waiting

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

Originating

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜ Call Waiting

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

Terminating

⎜

Y

⎜

N

Y

⎜

Y

⎜

Y

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

Y

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜ Distinctive

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜

Ringing

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜ Leave Word

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

Calling (No AP)

⎜

N

⎜

N

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜ Call Transfer/Conference

⎜

Y

⎜

N

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

Y

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

⎜

Alerting—Distinctive Ringing

For this feature, the switch generates distinctive ringing cycles (1-, 2-, or 3-burst ringing), which identify the type of call (internal, external, or priority) for the called party.

When DCS transparency is lost for any reason, terminal-to-terminal calls made between nodes produce 2- burst ringing instead of the usual 1-burst ringing. Loss of transparency may occur when the signaling link between the nodes or node and endpoint is down or when data transmission delay exceeds the trunk signaling time.

Automatic Callback on Busy or No Answer

This feature allows DCS users who placed a call to a busy or unanswered internal voice terminal/station to be called back automatically when the called terminal/station becomes available. When the calling and called terminals are idle, the switch automatically notifies both parties and makes the connection.

Exceptions are as follows: