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【Seller】Dialup Phone with VPN  
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Post Date: 2007-5-26      Expiry date: 2 weeks
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SIP RFC3261 – Full Compliant
  IP Version 4
  OTHER
  UDP(User Data Protocol)
  TCP(Transport Control Protocol)
  DHCP(Dynamic Host Configuration Protocol)
  DNS(Domain Name Server)
  TFTP(Trivial File Transfer Protocol)
  FTP(File Transfer Protocol)
  HTTP(Hypertext Transfer Protocol)
  RTP(Real-Time Protocol)
  ICMP(Internet Control Message Protocol)
  PPPoE(Point-to-Point Protocol over Ethernet)
  VLAN Tagging(802.1q)
  NAT(Network Address Translation)
  Data Rates from 300 bps to 56k bps (If needed in use, the rate can be limited by software)
  Data Modulation Standards V.90, V.34, V.432bis, V.22bis, V.22, V.23, V.21 and V.23 reversible(Minitel), Bell 212, Bell 103 Dialup Modem V.42 Error Control
 

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  VOIP+PSTN   TDM OVER IP
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