When requirements are growing these systems show how big they really are.
Design your own COMpact 3000! Do you need additional analog or digital extensions or an additional ISDN trunk line? In that case use one of the three expansion modules.

• With the COMpact 2a/b module you can expand your COMpact 3000 with two additional analog extensions to the maximum of six analog ports.
   
• Would you like to use an ISDN telephone as additional extension or do you like the convenience or a professional Auerswald system telephone? Then use the module slot for a COMpact S₀ module.
   
• NEW: With the COMpact ISDN module you are completely flexible. The ISDN port can be used as additional external trunk line or as internal expansion. When used internally it can switched over between S₀ (4-wire) and U_P0 (2-wire) mode. This gives you the possibility to use even “old analog” telephone wiring for the modern Auerswald system telephones.

The expansion modules are suitable for all three variants of the COMpact 3000 (analog, ISDN or VoIP). The slot is easily accessible after removing the top cover of the product. The housing itself must not be opened to insert the module. The electronics remain well protected.
 
Tuning your system with function and software upgrades.
Each COMpact 3000 can be expanded with two VoIP channels just by entering a release code which can be purchased at our local partner or directly in the Upgrade Center. These channels can be used independently as external channels for internet telephony or internally for IP telephony via the local network.

Do you want to dial out directly out of e.g. OutLook? Do you have a small business and want to see the matching data records immediately on your screen when a customer calls? In that case you need a small CTI solution. The COMpact 3000 is supporting already in the basic setup the data exchange via the network and the software interface TAPI for up to four internal subscribers. If more subscribers are necessary additional LAN-TAPI licenses could be purchased.

For the data transmission of point-of-sales terminals to the head office in several trade organisations the data protocol X.31 is used. To make this possible for ISDN connections this feature can be released for the COMpact 3000 at low costs.