Description The ARN router's slide-in WAN adapter modules offer the functionality of WAN transmission devices, supplying an integrated solution that is easily managed as a single platform. The WAN flexible interfaces of the ARN enable users to choose among today's alternative wide area networking links, including Point-to-Point Protocol (PPP) (synchronous or asynchronous), Frame Relay, X.25, ISDN, Switched Multi-megabit Data Service (SMDS) or Asynchronous Transfer Mode (ATM). Up to two WAN adapter modules can be inserted into the router. The modules ensure easy, cost-effective upgrades to newly available, higher bandwidth WAN services while preserving the initial router investment. When Switched 56 or ISDN BRI services are not available or considered cost-effective, the ARN router's integral V.34 modem adapter module can be used to support Nortel Networks dial services capabilities. Modem adapter module speeds range from 1, 200 bps to 115, 200 bps on standard analog telephone lines. Providing nominal speeds of 28.8 Kbps, the V.34 modem's standard V.42bis compression capabilities boost throughput to 115.2 Kbps or greater. Standard V.42 and MNP 10 error correction capabilities also ensure reliable transmission of mission-critical data.
