IPECS Release 5
Hardware Description & Installation
Issue 5.0
7
2.1.2 VOIM8 & 24 (Voice Over IP gateway Modules)
The eight (8) and twenty-four (24) channel Voice over IP gateway Module (VOIM8 and VOIM24)
perform packet 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 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.
The VOIM8 and VOIM24 include a 10/100 Base-T Ethernet interface using an RJ-45 type
connector. A second “LAN2” RJ-45 type connector is provided for future use. Both Ethernet
ports incorporate auto MDI and MDIX switching feature allowing use of either straight cable and
cross cable.
As shown in Figure 2.1.2-1, the front panels of the VOIM8 and 24 have:
•
Power jack for the AC/DC
adapter; see section 2.1.15
AD/DC adapter –G-,
•
Power status LED,
•
Normal/Service
switch,
•
One (1) RJ-45 Female LAN
connector for master processor
with Speed and Link/Act LEDs,
•
One (1) RJ-45 Female LAN
connector 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 2.1.2-1 VOIM8 & 24 Front & Rear Panels