??????????
????????
??????
?????????绰/VOIP???
?????绰????
????????????
ú??????
???????
???????????绰?????
???/IP????绰
???/IP?????绰
???/IP????????绰
SIP???????????绰
SOS???????????
????????????绰??
?????????
???????????
?????
???????硢???????
??????????????
??????: YT-ETBZ03
1. ???LED??????????????????
2. ???????30??40cm??????????
3. ?????????????????????
4. ?????????????
5. AC220V???????????????????滻??
????:??????????????绰??
??????? ? ???????
