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Thank you for purchasing the NEC “Xen Topaz” telephone system.
Due to the flexibility built into the system, your
Dialling Codes and Feature Capacities
may differ from those in
this guide. Check with your NEC Authorised Supplier / System Administrator and make a note of any differences.
Before using Your Telephone…
Using Your Telephone
The NEC AT-21 Single Line Telephone is displayed here. This User Guide describes general analogue Single
Line Telephone (SLT) procedures. Refer to the User Guide included with your specific SLT for details on
additional key functions.
Redial Key
Flash Key
Handset
Dial Keys
Message Lamp
Ring Key
Volume Control Keys
