4 - 50 Chapter 4
Chapter 4 - Terminals and Optional Equipment
4.15.4.1 Installing the APR Adapter:
1. Set the dip switches.
2. Unplug the keyset completely: line cord, LAN cable, and any power adapter which may be
connected to the keyset.
3. Lower the legs of the keyset if they are raised.
4. Remove the connector cover on the bottom of the keyset.
Figure 4-26: REMOVE THE CONNECTOR COVER
APR Dip Switches
Bit 1 Retro mode - Set to On when a UX5000 keyset with an APR adapter
is used on an Aspire telephone system (then set bits 2-4). Set to Off
for a UX5000 keyset with an APR adapter is used on a UX5000
system. (bits 2-4 or disregarded).
Bit 2 With retro mode on, determine if the CCPU controls the dB exchange
(On) or if the APR Bit 3 controls it (Off).
Bit 3 With retro mode on, determine if Non-0dB exchange/Hook Flash Start
Time should be used (On) or of 0dB exchange/Hook Flash Start Time
is used (Off).
Bit 4 With retro mode on, select the impedance: Off = 600ohm, On =
Complex
Bit 5 Unused
Bit 6 For firmware upgrade. Normal operation has this bit On.
Bit 7 Unused
Bit 8 Unused
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