Netgear XM128 QIG - Quick Install Guide - Page 43
Async to Sync PPP
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Chapter 5 Async to Sync PPP This chapter describes the application of asynchronous to synchronous HDLC conversion. Internet and Remote Access PPP and SLIP More and more Internet Service Providers are offering their services through dial-up ISDN lines for higher data bandwidth. The equipment used by your service provider frequently consists of ISDN LAN routers which, unlike a digital modem, do not have asynchronous capability. For this reason, terminal adapters that support only V.120 or asynchronous protocol do not work with this type of equipment. The Model XM128 modem converts the asynchronous data it receives from your computer to synchronous format in order to communicate with ISDN LAN routers. We call this process asynchronous to synchronous HDLC conversion or Async to Sync PPP (Point-to-Point Protocol) or Async to Sync Serial Line Internet Protocol (SLIP) protocol. Making Async to Sync PPP and SLIP calls In order to communicate with an ISDN LAN router (from vendors such as Ascend and Cisco), set the Model XM128 modem B channel protocol to one of the following: ATB40 (HDLC PPP) or ATB41(HDLC SLIP) You should also set the DTE speed based on the bandwidth that the switches support. Async to Sync PPP 5-1