• Built-in ISDN interface with B channel 1 for auto-call (semi-permanent), B channel 2 for dynamic connection. ISDN call suspension may be configured for both types of connection. The router senses when a remote transaction has ceased and terminates the call, while spoofing the services offered by the servers. When access to the network service is needed, the router automatically and transparently re-establishes and updates the service connection. Backup Links

  The routers can be linked together in a point-to-point topology using the standard backup link for disaster recovery, or with a second active link operating in loadshare mode (on the main link threshold).

Routing

• Supports static routes, learned dynamic routes, and proxy ARP to keep broadcasts off WAN links.

Transparent Bridging

• Support auto-learning of MAC addresses, custom address filters, packet type filters, and Spanning Tree.

Call Security

• Two levels of dial-up security are provided through XID and password authentication protocols.

Management

• A menu-based interface supports SNMP MIB-II and Telnet. Flash memory is used for firmware with TFTP download support.

DI-1U Module

• ISDN BRI Module for DI-1135C (1 RJ-45 U interface).

DI-3 Module

• V.35 WAN Module for DI-1135C (1 V.35 DB-25 interface).

DI-5 Module

• V.24 WAN Module for DI-1135C (1 RS-232 sync. interface).

DI-6 Module