Sony SPP-IM977, Service Manual

– 8 –

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1

When you hear the phone ring, press

(LINE 1)

 or 

(LINE 2)

 whichever button

is flashing.
The corresponding line button lights
up.
“TALK” appears on the display and
the display also shows the talk time in
hours, minutes and seconds.
“HANDSET  IN  USE” appears on the
display of the base phone and the line
button on the base phone double
flashes in succession.

2

When you’re done talking, press

(OFF)

 or replace the handset on the

base phone.
The display and the LINE 1 or LINE 2
button go off.

Receiving calls when the headset is connected

When the TL-HD1 headset (not supplied) is connected to the 

I

(HEADSET) jack, you can talk through the headset.

Precaution

Avoid listening your headset at so loud a volume that extended play might
affect your hearing.

To

Adjust the handset volume

Put a call on hold

Switch to another call
(“call waiting” service*)

Turn on/off the ringer of
the handset

*  You need to subscribe to the service from your telephone company.

Do this

Set the VOL switch to H (high), M (middle) or L
(low).

Press 

(HOLD)

.

The LINE 1 or LINE 2 button will flash slowly.
Press 

(LINE 1)

 or 

(LINE 2)

 to resume the

conversation.

Press 

(FLASH/CALL WAITING)

.

Press 

(FLASH/CALL WAITING)

 again to return to the

first caller.

See “Turning off the ringer of the handset” on
page 43.

Receiving calls

Additional tasks

VOL switch

(HOLD)

I

 (HEADSET)

jack

(FLASH/CALL WAITING)

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Note

If another call comes in by “call waiting” service while conversing with an
outside caller, you will hear two short beeps.

Tip

To inform you of an incoming call, the display shows “

**

  RINGING  

**

” when

ringing.

If you have subscribed to the Caller ID service;

• the caller’s number and/or name appears on the display when you receive a

call (see page 52) or when another call comes in by “call waiting” service.

• the ringer sound changes to a higher tone if the call matches the number

stored on speed dialing keys or in the Phone Directory (memory match
function; see page 52).

Receiving calls through the speakerphone

When you hear the phone ring, press

(LINE 1)

 or 

(LINE 2)

 whichever button is

flashing.
“SPEAKERPHONE” appears on the display
and the display also shows the talk time in
hours, minutes and seconds.
The corresponding line button lights up.
When you’re done talking, press 

(OFF)

.

To obtain the best speakerphone performance,
see page 27.

(HOLD)

(FLASH)

L1 and L2 RINGER
LEVEL switches

(VOLUME)

(LINE 1)

(LINE 2)

(MUTING)

MUTING
lamp

continued

(OFF)

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Receiving calls (continued)

To

Adjust the speaker volume

Adjust the ringer volume of
the base phone

Put a call on hold

Mute your voice

Switch to another call
(“call waiting” service*)

*  You need to subscribe to the service from your telephone company.

Do this

During speakerphone conversation, press

(VOLUME)(+)

 or 

(--)

. Each press of

(VOLUME)(+)

 or 

(--)

 switches the speaker

volume by one of  8 levels.

You can adjust the ringer volume of line 1 and 2
respectively.
Set the L1 or L2 RINGER LEVEL switch on the
base phone to HIGH, LOW or OFF.

Press 

(HOLD)

.

The LINE 1 or LINE 2 button will flash slowly.
Press 

(LINE 1)

 or 

(LINE 2)

 to resume the

conversation.

Press 

(MUTING)

 to disable the microphone.

The MUTING lamp lights up.
Press 

(MUTING)

 again to cancel.

Press 

(FLASH)

.

Press 

(FLASH)

 again to return to the first caller.

Additional tasks

Note

Even when you set the L1 or L2 RINGER LEVEL switch on the base phone to
OFF, the handset will ring when the ringer of the handset is turned on (see page
43).

Tips

• To inform you of an incoming call, the display shows “

**

  RINGING  

**

”

and the line button lights on and off according to the ring signal even when
you set the L1 or L2 RINGER LEVEL switch on the base phone to OFF.

• If there is an incoming call while on the intercom, the base phone will ring at

a low level even when the L1 or L2 RINGER LEVEL switch on the base phone
is set to OFF.

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Receiving a call while talking

If another call comes in while talking on the other line, the
corresponding line button will flash.

Example: Receiving 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)

.

Now you can talk to another caller on line 2.

3

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)

.

Notes

• If you do not press 

(HOLD)

 in step 1, line 1 will be disconnected.

• If another call comes in while talking on the base phone, a beep will be heard

through the base phone and the corresponding line button on the base phone
will flash.

• If another call comes in while talking on the handset, a ringer tone will be

heard once through the handset and the corresponding line button on the
handset will flash. At this time, the base phone will ring and the
corresponding line button will flash normally.

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.