NEC Univerge SV8100 System Hardware Manual page 188

UNIVERGE SV8100
5.5 CD-4DIOPB (DID/OPX Interface)
5.5.1
System Hardware Manual
CHUYÊN CUNG CẤP TỔNG ĐÀI NEC
Figure 4-24 CD-4DIOPB Blade
Description
The CD-4DIOPB supports the analog DID and single line telephone
interface functions (such as Off-Premise Extension <OPX>). The function
type is assigned in programming for each port. The circuit types, however,
should be grouped together. For example, with three DID circuits and one
OPX circuit, they should be grouped as DID, DID, DID and OPX and not
DID, DID, OPX and DID.
The CD-4DIOPB provides:
♦ Four DID trunk circuits or four OPX circuits
♦ Two Blade status LEDs
♦ -48VDC
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