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16 Chapter 3

Foreign Voltage

Pattern

If the TelephonyModem detects a foreign voltage on one or more telephone

lines, it repeats the following sequence:

•All LEDs on

•The LED corresponding to the telephonyline(s) with foreign voltage

If you see this sequence, immediately disconnect the affected lines and elimi-

nate the voltage source. Common sources of foreign voltage include:

•connection to incumbent telephone service

•shorted wires

•defective CPE

Note:All telephonylines must be physically disconnected from incumbent

service before connecting the lines to the TelephonyModem. Cancellation of

incumbent service is not sufﬁcient.

Touchstone® TelephonyRelease 6 Standard 1.0 December 2008

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Arris TM608 Guia de Instalação Página 26