4 - 50 Chapter 4Chapter 4 - Terminals and Optional Equipment4.15.4.1 Installing the APR Adapter:1. Set the dip switches.2. Unplug the keyset completely: line cord, LAN cable, and any power adapter which may beconnected 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 COVERAPR Dip SwitchesBit 1 Retro mode - Set to On when a UX5000 keyset with an APR adapteris used on an Aspire telephone system (then set bits 2-4). Set to Offfor a UX5000 keyset with an APR adapter is used on a UX5000system. (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 StartTime should be used (On) or of 0dB exchange/Hook Flash Start Timeis used (Off).Bit 4 With retro mode on, select the impedance: Off = 600ohm, On =ComplexBit 5 UnusedBit 6 For firmware upgrade. Normal operation has this bit On.Bit 7 UnusedBit 8 Unused
