Two alternative, customer-specific features for central speed dialing can be activated: namely 4-digit or 5-digit central speed dialing. The only change involves activation with the AMO ZAND.

The 5-digit version allows the first two dialed digits to be converted to an index to one of the 16 central speed dialing lists with the aid of a conversion table. This permits a speed dialing facility to be set up, for example, in which a 5-digit customer number is used to represent the customer's unabbreviated call number.

The conversion table must be patched on a customer-specific basis (refer to section "Entering the customer-specific data for the 5-digit speed dialing facility").