2-2
Chapter 2
Hardware Descriptions
Ring Generator Unit (RGU1 or RGU2)
Two kinds of sinusoidal–waveform Ring Generator Units are available: RGU1 provides 3W
ring signals; RGU2 provides 20W ring signals. RGU2 is required when a large number of sin-
gle line telephones are connected to the system.
Expansion Cabinet
One metal Expansion cabinet can be attached to the KSU. There are two types available.
Expansion “A” type (
Figure 2–1
) comprises three Universal expansion slots and one dedi-
cated card slot for a TEPRI or SVMi-8 card. Expansion “B” type (
Figure 2–2
) consists of
two universal expansion slots and two dedicated card slots. The Expansion cabinet connects
to the KSU via a 64-pin ribbon cable, two 2-wire power connections and an F-GND connec-
tion. It contains a 50-pin Champ connector for external connections.
When installing an SVMi-8 card, the plastic case should first be removed.
Figure 2
−
1 Expansion ‘A’ Type Figure 2
−
2 Expansion ‘B’ Type
Dedicated slot (TEPRI or SVMi-8 card)
Dedicated slot (SVMi-8 card)
Dedicated slot (TEPRI card)
