IPECS Release 5
Hardware Description & Installation
Issue 5.0
9
2.1.3.2
LGCM8
The eight (8)-port Loop Start CO gateway Module (LGCM8) provides eight (8) 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. Two Call Metering Unit
(CMU4) optional modules are needed to use the call metering function. Each CMU4 supports
four (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 LGCM8 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 2.1.3.2-1, the front panel of the LGCM8 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,
•
Eight (8) LEDs, one for status of each CO line,
•
Two (2) LEDs, one to indicate installation of each CMU4,
•
DB-9 RS-232 connector,
•
Reset
Switch.
On the rear panel, the LGCM8 has:
•
Eight (8) RJ-45 female connectors,
•
Ground
Lug,
•
Fifty (50)-pin back plane connector.
Figure 2.1.3.2-1 LGCM8 Front & Rear Panels
