iPECS UCP
Hardware Description and Installation Manual Issue 1.3
18
3.1.2 VOIM8 & 24 (Voice Over IP gateway Modules)
The eight (8) and twenty-four (24) channel Voice over IP gateway Module (VOIM8 and VOIM24)
perform protocol translation between standard H.323 or SIP protocol and the iPECS proprietary
protocol. The VOIM8 contains a single processor to support eight (8) VoIP calls. The VOIM24
contains two (2) processors to support maximum twenty-four (24) VoIP calls. The main processor
manages packet switching and signaling for all VoIP calls. DSPs are employed to support in-band
DTMF detection and transcoding between various codec types for each IP channel. The
transcoding feature enables users to communicate with each other, when the codec between
iPECS and other terminal is different.
Each VOIM8 and VOIM24 includes a 10/100 Base-T Ethernet interface using an RJ-45 type
connector. Both Ethernet ports incorporate auto MDI and MDIX switching feature allowing use of
either straight cable and cross cable.
As shown in
Figure 3.1.3-1, the front panels of the VOIM8 and 24 have:
Power jack for the AC/DC adapter; see 3.1.15 AD/DC adapter –G-
Two (2) green power status LEDs
PWR1 - + 5 VDC
PWR2 - + 3.3 VDC
Normal/Service switch
Two (2) RJ-45 Female LAN
connector for master processor
with Speed and Link/Act LEDs
Five (5) status LEDs
One (1) DB-9 RS-232 connector
Reset Switch
On the rear panel, the VOIM8 and 24
have:
Ground Lug
Fifty (50)-pin back plane
connector
Figure 3.1.2-1 VOIM8 & 24 Front & Rear Panels
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