CIG 6838联通版HGU是双协议栈的, SIP&H.248共版本,两种协议可以用下面哪条命令切换为SIP,重启后生效

• A、/s/tr069 set InternetGatewayDevice.Services.VoiceService.1.VoiceProfile.1.X_CT-COM_ServerType SIP
• B、/s/t/ set InternetGatewayDevice.Services.VoiceService.1.VoiceProfile.1.X_CU_ServerType SIP
• C、/s/tr069 set InternetGatewayDevice.Services.VoiceService.1.VoiceProfile.1.X_CT-COM_ServerType MEGACO
• D、/s/t set InternetGatewayDevice.Services.VoiceService.1.VoiceProfile.1.X_CT-COM_ServerType MEGACO