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YWH500 IP Phone
  
There are many kind of PA1688 IP phones made by Yuxin, all use their own software slightly different from our standard reference design. However, the operation of those phones are almost the same with the standard design.
Standard reference design IP phone web manual: SIP IAX2 H323 MGCP. Menu manual: SIP IAX2 H323 MGCP. Telnet manual: SIP IAX2 H323 MGCP.
YWH500 uses its own software with name like ywh500_sip_us_167006.bin. Both Yuxin and Palmmicro can provide the software. Large
Inside. Large
PCB detail.