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What is Ring Trip Mitigation?
The interaction of telephony and video signaling places special demands on VDSL2 splitters. When
a telephone is "off-hook," the battery at the central office provides -48VDC over the phone line. When the
phone is ringing, peak ring voltage is 127 volts. If the subscriber answers the phone (a condition called
"ring trip") at the negative peak of the voltage cycle, the instantaneous voltage (a combined -48VDC from
the CO battery and -127 from the ringer) adds up to -175 volts. When this happens, an ordinary splitter
can allow high-voltage, high-frequency transients to enter and interfere with the VDSL2 spectrum.
This, in turn, can cause corruption or loss of data packets and interference with video signals.
The problem is not too significant in the case of data since TCP/IP can request packet retransmission.
Video, on the other hand, is a streaming service and does not allow for retransmission. In order to provide
uninterrupted video service and compete with video services on cable, the service provider must use high quality
video-grade VDSL2 splitters. These splitters work with the DSL chipset to reduce or eliminate problematic
ring trip effects. Appropriate splitters must be configured at the CO and in the network interface device at
the customer premise.
See more VDSL2 considerations in our free whitepaper. |
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Founded in 1910, Suttle is a leading manufacturer of communication connectivity products to the major service providers and installers. Suttle provides connections for voice, data, and video communications throughout the world. Residential or commercial, new installation or retrofit, Suttle has the products to enable reliable communications.
An ISO 9001 and TL9000 registered company and headquartered in Hector, MN, Suttle is a wholly owned subsidiary of Communications Systems, Inc., a publicly traded company (NASDAQ: JCS).
Have questions or comments on how Suttle can better serve you? Contact Customer Service at suttlesales@commsysinc.com or by calling toll free at 1-800-852-8662, or visiting us online
at www.suttleonline.com.
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Last Month's Results
QUESTION:
What will the biggest driver of innovation in the telecom market?
ANSWERS:
00% - IP Based Services
12% - Video Delivery
38% - Consumer Apps
00% - Bandwidth Demand
50% - All Above
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