VOP1372G-61 User’s Guide 9
CHAPTER 1
Introducing the VOP1372G
This chapter introduces the VoIP line card's general features and hardware.
1.1 VOP1372G Overview
The VOP1372G VoIP Line Card is perfect for telecommunications providers, ISPs or large building
applications seeking to provide phone service via Voice over IP (VoIP) to subscribers while
minimizing costs. One VOP provides VoIP telephony service for up to 72 subscribers over existing
POTS telephone wiring.
The line to and from the user carries either voice alone, or both voice and data (ADSL/VDSL)
signals. For each line, a splitter card separates the high frequency ADSL/VDSL signal from the voice
band signal and feeds the voice band signal to the VOP1372G, while the ADSL/VDSL signal is
diverted to the ADSL/VDSL line card (ALC1372G or VLC1348G, for example).
The VOP1372G supports H.248 (also known as MEGACO - MEdia GAteway COntrol - or the Gateway
Control Protocol).
• Each VOP with H.248 firmware can operate as an individual media gateway or as part of a
centralized H.248 interface capable of spanning multiple VOPs or chassis and managing up to
1200 subscribers. You can use a backup VOP card for higher reliability of H.248 protocol
processing.
Use the Telco-50 connector pin assignments in Section 2.3 on page 19 along with the directions and
safety warnings in the IES’s User's Guide to install the line card and make the necessary
connections.
See the MSC’s User’s Guide for detailed information on configuring the line card.
1.2 General Features
System Monitoring
• System status (link status, rates, statistics counters)
• Temperatures, voltage reports and alarms.
• Port status (on/off hook, etc.)
Alarms
The VOP sends an alarm to the management system when voltage or temperature levels exceed
safe thresholds.
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