ADSL Router/Modem User Manual
Before You Use 
ix 
Before You Use 
Thank you for choosing the Asymmetric Digital Subscriber Line (ADSL) Router. With the 
asymmetric technology, this device runs over standard copper phone lines. In addition, ADSL allows 
you to have both voice and data services in use simultaneously all over one phone line. 
ADSL Router is designed to offer cost-effective high-speed services for home or office users. It 
provides a downstream rate of up to 8 Mbps and upstream rate of up to 1 Mbps for ADSL 
connection, even offers auto-negotiation capability for different flavors (G.dmt, G.lite, T1.413 Issue 
2 and so on) according to central office DSLAM’s settings (Digital Subscriber Line Access 
Multiplexer). Also the feature-rich routing functions are seamlessly integrated to ADSL service for 
existing corporate or home users. Now users can enjoy various bandwidth-consuming applications 
via ADSL Router. 
Features 
ADSL Compliance 
For Annex A model (RTA770W) 
 
ANSI T1.413 Issue 2 
  ITU G.992.1 Annex A (G.dmt) 
  ITU G.992.2 Annex A (G.lite) 
  ITU G.994.1 (G.hs) 
  Support dying gasp 
For Annex B model (RTA770BW) 
  ITU G.992.1 Annex B (G.dmt) 
  ITU G.994.1 (G.hs) 
ATM Features 
  Compliant to ATM Forum UNI 3.1 / 4.0 Permanent Virtual Circuits (PVCs) 
  Support UBR and CBR with traffic shaping 
  RFC2684 LLC Encapsulation and VC Multiplexing over AAL5 
  RFC2364 Point-to-Point Protocol (PPP) over AAL5 
  RFC2225 Classical IP and ARP over ATM 
  RFC2516 PPP over Ethernet: support Relay (Transparent Forwarding and Client functions) 
  Support PPPoA or PPPoE Bridged mode (the IP address got from ISP can be passed to the 
user’s PC and behave as the IP address of the user’s PC.) 
  OAM F4/F5 End-to-End/Segment Loopback Cells 
Bridging Features 
  Supports self-learning bridge specified in IEEE 802.1D Transparent Bridging 










