Callback; Caller Id - NEC DSX PRODUCT DESCRIPTION Manual

If an extension has more than one caller waiting, they queue on a first-in/first-out basis (FIFO). The exten-
sion will not hear Camp-On beeps for additional waiting calls.
Off-Hook Signaling also alerts the user when unanswered calls are waiting to get through. Turn to Off-Hook
Signaling (page 57) for more.
The following chart shows when the two types of Off-Hook Signaling occur. Note that Camp-On tones occur
for an extension when they are the exclusive recipient of the call (such as a DIL).
Key Ring
Transferred Outside Call
Direct Inward Line
Transfer from voice mail (UTRF)
Call Coverage Key
Group Call Pickup Key

Callback

With Callback, a user does not have to repeatedly call a busy extension back, hoping to find it idle.
When an extension user calls a busy co-worker, they can leave a Callback request for a return call. The sys-
tem services Callback requests as follows:
Caller at extension A leaves a Callback at extension B.
❥
- Caller can place or answer additional calls in the mean time.
When extension B becomes idle, the system rings extension A. This is the Callback ring.
❥
Once caller A answers the Callback ring, the system rings (formerly busy) extension B.
❥
- If caller A doesn't answer the Callback ring, the system cancels the Callback.
As soon as caller B answers, the system sets up an Intercom call between A and B.
❥
An extension user can leave a Callback at many extensions simultaneously. The system processes the Call-
backs as the extensions become free. In addition, many extensions can leave a Callback at the same exten-
sion. The system processes these Callbacks on a first-in/first-out (FIFO) basis.
If an extension user leaves a Callback request and then fails to answer within four rings, the system cancels
the Callback.

Caller ID

Caller ID automatically displays the phone number and optional name for incoming outside calls.
Caller ID allows a display keyset to show an incoming caller's telephone number (called Directory Number
or DN) and optional name as the call is ringing. Caller ID supports the telco's Called Number Identification
(CNI) and Called Number Delivery (CND) service, when available. These services provide the Caller ID
information (i.e., messages) between the first and second ring burst of an incoming call.
Caller ID provides the following features:
DSX Product Description
Off-Hook Ringing Camp-On Tones
Yes
Yes
Yes
Yes
Yes
Yes
Features ◆ 29
No
Yes
Yes
Yes
No
No