NEC Univerge SV8100 System Hardware Manual page 351

destination in Program 15-12 will be followed.
 15-12-02 : Conversation Recording Destination for Extensions - ACI
Determine whether an extension should be automatically recorded when an
incoming call is received (0=off, 1=on).
External Ringer
 31-05-01 : Universal Night Answer/Ring Over Paging
For each trunk port which should ring the external ringer, enter "1".
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CHUYÊN CUNG CẤP TỔNG ĐÀI NEC
Automatic Recording for Incoming Call
Installing SV8100 Optional Equipment
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UNIVERGE SV8100