Expansion Main Board Unit (Embu/Ntb412) - Vertical SBX IP 320 Installation Manual

Expansion Main Board Unit (EMBU/NTB412)

Table 4-9 LED Indications
LED
Expansion Main Board Unit (EMBU/NTB412)
The Expansion Main Board Unit (EMBU), shown in Figure 4-4, provides the following:
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1-1 Periodic Toggle - ON, 300 msec; OFF, 300 msec
1-2 In Use or Idle Status - ON, One or more Ports in use; OFF, Idle
1-3 Timer - Flashes every 100 msec
1-4 LCD Active Updating - Flashes every 300 msec
DKT and SLT Interface Circuits
Ring Generation circuit
External Relay contacts for LBC or General purpose
Peripheral Device Decoding circuit
Master Clock Generation circuit
⇔
PFT circuit [CO1 the last SLT port (STA8)]
PCM Voice Processing circuit with ACT2 (ASIC, voice switching including DSP) device
for PCM tone generation and PCM gain control.
MEANING
SBX IP 320 Installation Guide
Chapter 4: Board Installation
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