Technical data

Electronic telephone book

Automatic redialling/Call-back on busy

You can set the Retell 340 to automatically re-dial busy numbers (up to 10 dialling attempts can be executed). If the function

“Call-back on busy” also known as CCBS (completion of call to busy subscriber) is chosen, your telephone will ring as soon as the

target subscriber replaces his handset. But, this function needs to be supported by your telephone network and your telephone

system (see also operating instruction of the telecommunications provider or operating instructions provided by the manufacturer

of your telephone system). Normally, you need to dial a specific character/numeric string (e. g. HOOK FLASH *37#) to activate the

call-back on busy function. This string needs to be pre-set as described under “Settings”.

℡

You make an outgoing call and the target subscriber num-

ber is busy.

The display shows “subscriber busy”.

Press the select button next to the redial symbol to initiate

an automatic redialling process.

After a pause of a pre-set duration, the dialling process is re-

peated up to 10 times.

Press the select button next to the call-back symbol to ini-

tiate an automatic call-back.

Your telephone will ring as soon as the target subscriber re-

placed his handset.

Take the call over by picking up the handset. Hold the conversation.

You do not want to initiate an automatic redialling or call-

back process. Press stop; pick-up the handset or just wait

for 10 seconds.

The display resumes the initial state.