Lucent Technologies DT3 Telephone Manual page 5

On-Hook Dialling, Speaker & Answer Release
Tones & Ringing
The Phone Lamp
INDeX 8.1 - DT 3/4/5 Telephone Guide
On all DT phones you can dial and hear the call progress
without using the handset (known as "on-hook dialling").
Pressing the ANSWER RELEASE key has the same effect as
lifting or replacing the handset.
When answered, on a DT4 you must use the handset to speak.
On DT3 and DT5 phones you can continue the call without
using the handset, ie. handsfree.
The phone uses various tones and rings to indicate events. A
sample of these appears below. You can alter the ringer
volume, sound, switch it on/off, etc. (see page 30) .
Incoming Calls:
– Repeated Single Ring: Internal call.
– Repeated Double Ring: External call.
– Repeated Triple Ring: System or personal alarm.
– Single Tone: Page call (see page 16) .
During Calls:
– Repeated Double Pip: You have set a camp on (see page
13) .
– Repeated Single Pip: Another extension is about to intrude
or has intruded on your call.
Making Calls:
– Dial Tone: Dial number.
– Broken Dial Tone: Phone on divert or no calls (see page
20) .
– Repeated Tone: Busy number (see page 12) .
– Triple Tone: Call diverting to external number.
– Continuous Tone: Number called unobtainable or set to no
calls. Phone locked or barred.
The phone uses its lamp (above the SPEAKER key) to show
calls and messages.
– Fast Flashing Lamp: Call Waiting (see page 24) .
– Lamp On: Message (see page 16) .
– Repeating Double Flash: External call.
– Repeating Single Flash: Internal call.
DT Display Phone Features – Page 5
38DHB0002UKAL - Issue 1 (08/99)