Sony SPP-IM977, Service Manual

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Making calls (continued)

If the battery becomes weak during a call

The handset will beep every three seconds five times and 

E

 and

“BATTERY  LOW” appears on the display. Finish your call and charge
the battery pack.

For optimum performance, charge the battery for a full 12 hours.

Note that during the first 10 - 15 minutes of charging, the phone will be
inactive, i.e., unable to make or receive a call.

After this initial 10 - 15 minutes, you 

may

 be able to use the phone, but

the battery duration will be 

very short

; thus it is recommended that

you 

fully charge

 the battery before the next usage.

If you have a spare battery

You can replace the battery pack without disconnecting the call during
a conversation. To replace the battery pack, perform the following
procedure.

1

Press 

(HOLD)

 on the handset.

The call is on hold and “HOLD” appears on the display.

2

Replace the battery pack.

3

Press 

(LINE 1)

 or 

(LINE 2)

 to resume the conversation.

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Making calls through the speakerphone

Press 

(LINE 1)

 or 

(LINE 2)

 on the base

phone.
“SPEAKERPHONE” appears on the
display and the display also shows the talk
time in hours, minutes and seconds.

The corresponding line button lights up.

Dial the phone number.

To adjust the speaker volume, press

(VOLUME)(+)

 or 

(--)

. Each press of

(VOLUME)(+)

 or 

(--)

 switches the speaker

volume by one of  8 levels.

To mute your voice, press 

(MUTING)

 to

disable the microphone. The MUTING
lamp lights up. Press 

(MUTING)

 again to

cancel.

When you’re done talking, press 

(OFF)

.

Notes

• The LINE 1 or LINE 2 button on the base phone double flashes in succession

and the display on the base phone shows “HANDSET  IN  USE”, when the
handset is used. If you press 

(LINE 1)

 or 

(LINE 2)

 whichever button is

flashing, you can talk to the handset and to the line connected.

• When the talk time exceeds 9:59’59, the display counts from 0:00’00 again.

To obtain the best speakerphone performance

• You may not be able to hear the other party’s voice in a noisy place.

Therefore, use the speakerphone in a quiet room.

• Do not bring your hand or other object too close to the microphone

or you will hear a shrill noise (“feedback”).

• When the speaker volume is loud, or the base phone has been placed

close to a wall, you may find that the volume drops suddenly.  This
is due to a circuit in the telephone designed to protect against
feedback.  In such cases, lower the speaker volume slightly.

(LINE 1)

(LINE 2)

(VOLUME)

(MUTING)

MUTING
lamp

continued

(OFF)

(REDIAL/PAUSE)

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Redialing

1

Press 

(LINE 1)

 or 

(LINE 2)

 to select the line.

The corresponding line button lights up.

2

Press 

(REDIAL/PAUSE)

 to redial the last number dialed.

Note

If the number exceeds 32 digits or if it is erased, five short error beeps will alert
you that the number cannot be redialed.

Tip

The number to be redialed is the last number dialed either on the handset or on
the base phone.

To check the phone number before redialing

While either the handset or base phone is not in use, press

(REDIAL/PAUSE)

.

The last number dialed is displayed for five seconds.

To dial the number, press 

(LINE 1)

 or 

(LINE 2)

 while the number is

displayed.

Note

The number will not be displayed if the last number dialed exceeds 32 digits or
if it is erased.

To erase the last phone number dialed

While either the handset or base phone is not in use, press

(REDIAL/PAUSE)

 twice within five seconds.

The number will be erased from the memory, and you will hear a long
confirmation beep.

Making calls (continued)

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Making another call while talking

Example: Making a call on line 2 while talking on line 1

1

Press 

(HOLD)

 while talking.

The line 1 is put on hold and the LINE 1 button flashes
slowly.

2

Press 

(LINE 2)

.

3

Dial a phone number for the second party.

Now you can talk to the second party on line 2.

4

To put on hold line 2 and resume the conversation on line 1,
press 

(HOLD)

, and then 

(LINE 1)

.

or

To disconnect line 2 and resume the conversation on line 1,
press 

(LINE 1)

.

Note

If you do not press 

(HOLD)

 in step 1, line 1 will be disconnected.

You can talk with two parties at the same time using both line 1 and
line 2, see “Having a conference call” on page 49.