LG-Nortel IPECS, Руководство по установке

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IPECS Release 5
Hardware Description & Installation
Issue 5.0
8
2.1.3 LGCMs (Loop Start CO gateway Module)
2.1.3.1
LGCM4
The four (4)-port Loop Start CO gateway Module (LGCM4) provides four (4) CO/PBX Loop Start
Line interfaces. These interfaces support pulse or DTMF dial signals. Each Interface contains
ring and loop current detection circuits, speech codec and compression functions and loop
signaling circuits. The circuitry and software support tone detection. A Call Metering Unit (CMU4)
optional module is needed to use the call metering function. Each CMU4 supports 4 ports and
there are three versions, based on protocol CMU4-12PR, CMU4-16, CMU4-50PR. Each version
is for different regions as shown below.
•
12PR – Australia, Denmark, Italy, Spain, Sweden
•
16 – Belgium, India, Israel, Norway, South Africa
•
50PR – Australia, India, South Africa, South Korea, United Kingdom
The LGCM4 includes a 10/100 Base-T Ethernet interface as well as packet voice processing
functions. The Ethernet port incorporates auto MDI, MDIX switching, therefore, both straight and
cross cables can be used.
As shown in Figure 2.1.3.1-1, the front panel of the LGCM4 has:
•
Power jack for the AC/DC adapter; see section 2.1.15
AD/DC adapter –G-,
•
Power status LED,
•
Normal/Service switch – In Service mode, circuits in use are
busied as they return to idle,
•
RJ-45 Female LAN connector with Speed and Link/Activity
LEDs,
•
Four (4) LEDs, one for status of each CO line,
•
One (1) LED to indicate if a CMU is installed,
•
DB-9 RS-232 connector,
•
Reset Switch.
On the rear panel, the LGCM4 has:
•
Four (4) RJ-45 female connectors
•
Ground Lug,
•
Fifty (50)-pin back plane connector.
Figure 2.1.3.1-1 LGCM4 Front & Rear Panels