Technical data
Table of contents 
2 
Example on how to enter the call forwarding function................................ 29 
Individual ringing tone ..................................................................................... 30 
Automatic two-way conversation recording................................................... 32 
Programmable parameters for the automatic two-way conversation recording 32 
Settings for the automatic two-way conversation recording ....................... 32 
Electronic telephone book ............................................................................... 33 
General information ................................................................................... 33 
Editing and storing entries ......................................................................... 33 
Overview of possible characters and numbers .......................................... 35 
Searching for entries.................................................................................. 35 
Checking and changing entries.................................................................. 36 
Dialling via the electronic telephone book.................................................. 36 
Automatic redialling/Call-back on busy ...................................................... 37 
Code lock........................................................................................................... 38 
Locking the device/change PIN.................................................................. 38 
Unlock the device....................................................................................... 39 
Message and VIP function ............................................................................... 40 
Message function....................................................................................... 40 
VIP function ............................................................................................... 41 
Remote control.................................................................................................. 42 
Remote operation ...................................................................................... 42 
Remote control functions ........................................................................... 42 
Remote activation of the answering mode ................................................. 44 
Mailboxes .......................................................................................................... 45 
General information ................................................................................... 45 
Setting parameters for the mailboxes ........................................................ 45 
Mailbox set-up............................................................................................ 45 
Mailbox handling ........................................................................................ 46 
Remote control of the mailboxes................................................................ 47 
Service menu..................................................................................................... 48 
Appendix ........................................................................................................... 49 
General information ................................................................................... 49 
Troubleshooting ......................................................................................... 50 
Factory pre-set........................................................................................... 52 
Technical data............................................................................................ 53 
Index .................................................................................................................. 54 
Other Products Available ................................................................................. 55 
Retell 953 Professional Telephone Answering Machine ............................ 55 
Brief operating instructions............................................................................. 56 










