Specifications

Section 2: PCB Installation and Startup
Aspire S Hardware Manual Section 2: PCB Installation and Startup ◆ 2-17
2
Digital Station (8ESIU-S) PCB (Figure 2-7)
The 8ESIU-S PCB provides:
● 8 digital extension circuits (used for digital telephones, DSS consoles, 1SLTAD adapters, 2PGDAD
adapters)
The 8ESIU-S is not rated for OPX use. It is recommended that a 2DIOPU-S PCB be used instead (it
supports analog DID and single line telephone interface functions, such as Off-Premise Extensions).
● 1 extension status LED (indicates status for 4 extensions)
● 1 PCB status LED
The CN3 and CN4 connectors each provide connection to 4 digital station ports. The ESIU-S requires one
universal slot, with a maximum of 2 PCB’s per system. Note that this PCB can not be installed in slot 7 or 8.
The 8ESIU-S consumes 8 ports ranging between ports 01-26. There must be enough available ports in order
for the Aspire system to recognize an 8ESIU-S PCB.
LED Indications
LED Function LED Status Operation Status
LD2
(PCB Status)
Indicates the status of
the PCB.
Green On Initializing
Green Flashing
(slow flash)
Initialization problem
occurred during self-check.
Green Flashing
(100ms On/Off)
Operating normally
Green Off Downloading
LD1 Indicates the status of
terminals 1-8.
Red On Terminal in use
Red Off Terminal idle