
VMMI Programming Exercises
GCA39-082 Rev 2, Issue 9/01 Page 6 Printed in the USA
Exercise 11: Group Intercoms
Pre-Setup Discussion
Hybrid Mode
The Hybrid mode, or PBX mode, is an arrangement where the system telephones do not have
direct line appearances. Instead, they use the intercom key to make or receive calls. In addition
to the intercom key, they may have call keys or group intercoms. These group intercoms are
extra intercom keys that allow a telephone user to handle multiple calls.
The “call 1” and “call 2” buttons are group intercom keys. If the personal intercom number was
110, then typically the group intercom numbers would be 3110 and 4110.
Intercom key
Group intercom keys
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