KX-NT543RU, KX-NT543RU-B, KX-NT546RU, KX-NT546RU-B (serv.man2) - Panasonic PBX Service Manual (repair manual). Page 18

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18
KX-NT543RU/KX-NT543RU-B/KX-NT546RU/KX-NT546RU-B
7 Test Mode
7.1.
Loopback Test Mode
This is for VoIP Communication Test Connection Chart.
7.1.1.
Preparation
Preparation device
• Unit for Test phone
• AC adaptor( or LAN cable and switching hub with PoE)
Set up unit in test mode by key control
1. Connect power plug (AC adaptor/PoE).
2. Push [1][*][CONF] keys within 5 seconds after power on.
3. Keep it until "Now Loading" is displayed on LCD
   Now Loading
*If "IPL start..."is displayed before "Now Loading" on LCD,it fails in the setting for Test mode
  Try agin from Step.1
4. Release keys. 
5. After 10 seconds,"HOOK Test" is displayed on LCD.
6. Press "SP-phone" key 8 times slowly.
"ACOUSTIC TEST" is displayed on LCD.
7.1.2.
Communication Test
It is set to Loopback Test mode to connect "Send signal" with "Receive signal" by inputting two number.
Input number is 6,7 and 8 and the mode is as follows
(I) :  Input    6.SP-phoneMIC  7.HandsetMIC  8.HeadsetMIC
(O): Output  6.SP-phoneSP   7.HandsetSP    8.HeadsetSP
For example
1. Handset MIC  
→  Handset SP

          7                             7
   I:HsMic_WB
   O:HsSp_WB
                   * WB:Wide Band
→ No sound
2. Handset MIC  
→  SP-phone SP

          7                             6
   I:HsMic_WB
   O:Sp_WB
→ OK
This result shows there is a problem in the signal line of Handset SP.
7.1.3.
Quit Test Mode for communication test 
Just power off.
Headset
AC Adaptor : PQLV206**
  or Equivalent
  or PoE(to LAN port)

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