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7 At the first bus telephone, hold
down the internal call button you
wish to use to call the second bus
telephone for 4 seconds. A pro-
tracted tone is audible. The bus tel-
ephone is now programmed. Do not
yet replace the receiver.
10 Switch off the programming
mode at the VSNG 850-...
8 At the second bus telephone,
hold down the internal call button
you wish to use to call the first bus
telephone for 4 seconds. A pro-
tracted tone is audible. The buttons
are now programmed at both bus
telephones.
9 Replace the receiver at both bus
telephones. Program additional bus
telephones using the same proce-
dure or quit the programming mode.
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