Aria-130 Digital Key Telephone System
Issue: 1.2
Installation Manual
22
2.4.1 KSU (Key Service Unit)
The KSU is a metal frame cabinet designed for wall mounting. It contains a back plane with 12
connectors which are 6 universal slots, MPB slot, PSU, PFTU, RGU, CN11(clock chain) and connector
for Link cable. ARIA-130 system is 2-story KSU consisted of the 1’st and 2’nd KSU. It’s possible to install
all kinds of boards according the Table 2.4.1. Cable ties are located on the front edge of the lower card
rail to allow connecting cables for the station boards, CO interface boards, and MISB to be neatly
installed. The connecting cables for the stations and CO Lines exit through the outlet in the bottom of
KSU and can be connected to the MDF or to a user installed termination point.
Figure 2.4.2 KSU structure
Figure 2.4.3 Board Configuration of MB
ARIA-130 MB
Iss: Rev:
RGU
PFT
SLOT1
SLOT2
SLOT3
SLOT4
SLOT5
SLOT6
MPB
