Aria-130 Digital Key Telephone System
Issue: 1.2
Installation Manual
38
2.4.12.7 SIU (Serial Interface Unit)
SIU provides additional one RS-232C interface circuits in MSIB. The SIU is useful for system
maintenance, PC based admin., SMDR print out and SMDI for PC based voice mail system. Followings
are the list of the system’s output;
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Administration database
-
Off-line SMDR (on-demand)
-
On-line SMDR
-
Statistical Information
-
SMDI (voice mail)
-
System trace data
The SIU can be optionally installed on MPB.
2.4.12.8 DTRU/DTRU II/DTRU4 (DTMF Receiver Unit)
A DTRU contains 2 DTMF receiver circuits, and a DTRU II has 4 DTMF receiver circuits. Each receiver of
DTRU /DTRU II is time-shared under the control of the system software, as a system resource regardless
its position.
The DTRU can be optionally installed on SLIB24, SLIB48, DSIB and LCOB.
The DTRU II can be optionally installed on SLIB II.
The DTRU4 can be optionally installed on LCOB8, SLIB2E and SLIBII.
Maximum DTMF receivers are 46 in ARIA-130 system.
2.4.12.9 MSGU/MSGU48/MSGU II (Message Wait Unit)
The Message Wait Unit sends 90V DC signal to the SLT illuminating the Message Wait lamp. The MSGU
and MSGU48 contain 6 circuits to support 6 SLTs. The MSGUII contains 12 circuits to support 12 SLTs.
The MSGU can be optionally installed on SLIB24 and DSIB.
The MSGU48 can be optionally installed on SLIB48 and SLIB2E.
The MSGU II can be optionally installed on SLIB II.
2.4.12.10
CPTU (Call Progress Tone Detection Unit; CPTU/A, CPTU/B, CPTU4)
The Call Progress Tone Detection Unit is used to detect specific call progress tones which are supplied
from the CO or PABX. Tone detection is employed to support features such as ACNR(Automatic Called
Number Redial). CPTU provides 2 tone detection circuits that are time-shared under the control of the
system software, as a system resource regardless its position.
CPTU have two versions; CPTU/A and CPTU/B. CPTU/A has wide tone detection range (305Hz -
640Hz), and CPTU/B has narrow tone detection range (350Hz, 620Hz, 440Hz, 480Hz
1% ).
The CPTU can be optionally installed on the LCOB.
The CPTU4 can be optionally installed on the LCOB8.
