Appendix

Troubleshooting

My calls fade out

If you are using the handset when this problem occurs,

or cut in and out

 

try unplugging the coiled handset cord and firmly

when I am using the

 

plugging it in the handset and telephone base again.

telephone.

If you are using the speakerphone when this

 

 

 

problem occurs, eliminate any background noise.

 

 

Noise from the television, radio, or other appliances

 

 

might cause the speakerphone to cut in and out.

 

 

Try pressing MUTE when you are not speaking to

 

 

eliminate the background noise.

 

Disconnect the telephone base from the telephone

 

 

wall jack and plug in another corded telephone. If

 

 

calls are still not clear, the problem is probably in

 

 

the wiring or local service. Contact your telephone

 

 

service provider (charges may apply).

 

If you subscribe to high-speed Internet service

 

 

(digital subscriber line - DSL) through your

 

 

telephone line, you must install a DSL filter between

 

 

the telephone line cord and the telephone wall jack

 

 

(see Telephone installation on page 7). The filter

 

 

prevents noise and caller ID problems caused by

 

 

DSL interference. Please contact your DSL service

 

 

provider for more information about DSL filters.

 

 

 

I hear other calls

Disconnect the telephone base from the telephone

when using the

 

wall jack. Plug in a different telephone. If you still

telephone.

 

hear other calls, the problem is probably in the

 

 

wiring or local service. Contact your telephone

 

 

service provider (charges may apply).

 

 

 

Display screen is

Make sure the power adapter is securely plugged in the

blank.

 

POWER jack on the back of the telephone base and

 

 

into an electrical outlet not controlled by a wall switch.

 

 

 

Operation during a

This telephone operates during a power failure if a

power failure.

 

telephone line cord is installed between the wall

 

 

jack and the telephone base. You are able to answer

 

 

calls with the handset, and dial calls using the dial

 

 

pad keys. No other features work unless AC power is

 

 

recovered. All settings in menu options (except SET

 

 

TIME/DATE) and all messages stored in the mailbox

 

 

are retained during a power failure.

 

 

 

54

Page 60
Image 60
AT&T CL4939 user manual Troubleshooting