Chapter 2 - Blade Installation and Startup
Chapter 2 2 - 69
2.7.3
Direct Inward Dial (DID) (4DIOPU) Blade (Figure 2-32) - P/N 0911054
The 4DIOPU blade supports the analog DID and single line telephone interface functions (such as Off-Premise
Extension). The function type is assigned in programming for each port. The circuit types, however, should be
grouped together. For example, with 3 DID circuits and 1 OPX circuit, they should be grouped as DID, DID,
DID and OPX and not DID, DID, OPX and DID.
The DIOPU blade provides:
● 4 (4DIOPU) DID trunk circuits
● 4 (4DIOPU) DID trunk status LEDs
● 2 blade status LEDs
The DIOPU blade can be installed in any universal slot.
2.7.3.1 LED Indications
LED Indication
Operation Status Operation Status
Live LED
(green)
Busy LED
(red)
On On Blade initializing
Flashing
(1 second)
On Blade assignment refused (system
capacity exceeded or software
version incorrect)
Flashing
(1 second)
Trouble found during self-
diagnostics routine.
Flashing
(100 ms)
On Normal operation At least 1 channel busy
Off All channels idle
Off On Blocked blade At least 1 channel busy
Off All channels idle
Flashing
(80 ms on/
off x 3/400
ms off)
Downloading firmware
● Blades with “IP3NE” included as part of the blade name printed on the card
cannot be combined with any “IP3WW” version blades. The “IP3NE” are U.S.
versions, while the “IP3WW” are international versions of the blades.
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