TELEDEX BTX4550 User Manual

Included with the BTX4550 are (one each):

• Base unit

• Coiled handset cord

• User guide

• Handset

• Clear plastic overlay

• Line cord

Contact your supplier or Teledex for information on ordering

custom designed and printed faceplates to enhance the look of your

Teledex BTX4550 telephone.

1) Located on the left side of the BTX4550 is a modular jack

labeled

Insert one end of the coiled handset cord

into this jack (until you hear it click).

2) Insert the other end of the coiled handset cord into the modular

jack on the handset.

3) Turn the telephone so the back panel is facing you. Insert either

end of the line cord into the jack on the back of the telephone

this jack is labeled

4) Insert the other end of the line cord into a telephone wall jack.

5) The overlay is easiest to remove by, with your fingers, squeezing

the outer edges causing a slight bow in the middle, then carefully

remove one side of the overlay from the 3 tab guides. The over-

lay is easiest to insert when; The left or right side tabs are insert-

ed first, and the middle part of the overlay is slightly bowed to

allow for insertion of the other tabs.

1) Lift the handset to connect to the ringing line.

2) To end the call, hang up by replacing the handset.

1) Lift the handset.

2) Listen for dial tone, dial the desired number, or press the 

key to automatically dial a number.

3) To end the call, hang up by replacing the handset.

The raised red lens is a Visual Ring Indicator and Message Waiting

light. The lens will flash when the telephone is ringing. Additionally,

some telephone systems permit an operator or message center to turn

on the red Message Waiting light to alert you that you have a message

waiting.

The DATA PORT provides convenient access to the telephone lines

for connecting modems, fax and answering machines or other tele-

phone components.

To use the DATA PORT: 

Insert the modular line cord from your facsimile machine, modem,

etc., into the jack labeled 

. 

The BTX4550 has two ring volume settings. 

To change the ring volume: 

Locate the adjustment control on the back of the telephone labeled

. Slide the switch to the desired LOW or HI ring vol-

ume.

The BTX4550 has 10 programmable 

keys. These keys

can be programmed to automatically dial telephone numbers or, to

activate telephone system features when connected to a compatible

PBX.

The telephone will dial the number each time an AUTO DIAL key is

pressed.

To store an AUTO DIAL number:

The telephone must be connected to a telephone jack.

1)

Lift the handset.

2)

Press the 

key and release it.

3)

Enter the telephone number including PAUSE or FLASH* as

required (See diagram for key location). The dialing sequence can

be up to 15 digits.

4)

Press the 

key where the number is to be stored.

5)

Replace the handset.

The flash key provides a timed line interrupt typically used for

accessing PBX/CO features like transfer and conference. The timing

of the hookflash is programmable with the factory default timing set

to 600 milliseconds. Some PBX's may require you to change the

hookflash timing from the default 600ms. 

To change the hookflash timing:

1)

Lift the Handset.

2)

Press the 

key (see diagram on back page).

3)

Press the 

key (see diagram on back page).

4)

Select 1 - 9 on the DTMF pad. The number selected will be the

new flash timing in milliseconds (ie: "3" = 300 milliseconds).

5)

Press the 

key.

The PAUSE key can be used to provide a timed pause between

dialed digits within an autodial key. The timing of the pause is pro-

grammable with the factory default set to zero (0) seconds. 

To change the PAUSE timing:

1) Lift the Handset.

2) Press the 

key (see diagram on back).

3) Press the 

key (see diagram on back).

4) Select 1 - 9 on the DTMF pad. The number selected will be the

new pause timing in seconds (ie: "3" = 3 Seconds).

5) Press the 

key.

Press the red 

key. The red HOLD LED will light. The handset

can be replaced in the cradle without disconnecting the call.

To retrieve a call from HOLD, lift the handset from the cradle posi-

tion. If handset is not in cradle, simply depress the 

key.

The 

key increases the handset volume to aid in

hard to hear environments.

At the start of each call the handset volume is at normal level.

Pressing the handset volume increases the handset volume. Pressing

the key again increases the handset volume additionally. Pressing the

key a third time returns the handset volume to the normal level.

To REDIAL the last telephone number dialed:

1) Lift the handset, listen for dial tone.

2) Press the 

key, the BTX4550 will dial the last number

dialed.

NOTE: Some PBX's require a pause after the first digit to access an

outside line. The REDIAL function will automatically incorporate a

pause if the dialed number is 7 digits or more. The inserted pause

will be of the same duration as set in the pause timing.

Press the Mute key, the red LED below the 

key will light. The

party on the other end will not hear you when the MUTE key is

depressed. Pressing the 

key again will release the key. This will

allow the other party to hear you. This is for both handset and

speakerphone calls.

1) Without lifting the handset, press the 

key. The

red Speaker LED will light.

2) Listen for dial tone. Dial the desired number, or press an 

key to automatically dial a number.

3) To end speakerphone calls, press the 

key . The

LED will go out.