Panasonic KX-T336 System Reference Manual page 130

Short Jumper Setting for KX-T96187
SW2, SW3
NOR Normal (default)
TEST TEST (see Note)
Note:
Loop Back Test
The user can check KX-T96187 by the following procedure.
1. Remove T-1 cable from KX-T96187.
2. Set SW2 and SW3 to TEST position.
3. Check SYNC LED (green).
• If SYNC LED does not light or flash, KX-T96187 does not work.
4. Set SW2 and SW3 to NOR position.
SW5
T336 Mode for KX-T336 (default)
TD500 (Reserved)
2-C-28-12
(70695)