Aria Aria-130, Руководство по установке

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Aria-130 Digital Key Telephone System Issue: 1.2
Installation Manual
73
3.4.5.2 LCOB8 Installation
LCOB8 provides 8 Loop Start CO line interfaces. The board can be optionally equipped with two Call
Metering Unit (CMU4) boards to monitor call charge and a Call Progress Tone Unit (CPTU4) board to
detect call progress signals and a DTMF Receiver Unit (DTRU4) to detect DTMF.
A CMU4 supports 4 channels call metering function. And the appropriate type of CMU4 should be
installed on the line according to the national specification.
If required, install the DTRU4, CMU4s and CPTU4 on the CO interface board as shown in Fig 3.4.12.
Figure 3.4.10 LCOB8, CMU4, CPTU4 and DTRU4 configuration
Function of Switch
SW Function Remark
SW1
Mode selection switch
ON : Country mode
OFF : CTR21 mode 1), 2)
SW2
Upper Side - Normal Operation(short loop)
Lower Side - Service Position(long loop)
3), 4)
Table 3.4.20 Switches on LCOB8
•
Note:
1. Country mode : H/W gain and transmission characteristics depend on Each country
Spec.
2. CTR21 mode : H/W gain and transmission characteristics depend on CTR21
Specification.
3. ARIA-130 does not support the function of normal/service selection.
4. SW2 is used for selection of short loop or long loop in special country.
[ special country (impedance = 600ohm ) : Standard, India, Israel, China ]
ARIA 130 LCOB8 I
CN2
CN9
DTRU4
……
CPTU4
….
CN8
ON:COUNTRY
OFF:CTR21
CMU4 CMU4
CN4 CN6
CN5 CN7
SW2
CN3