X.25 traffic is passed transparently through the Passport 6400 unit. Since the FRAD is likely to be operating as an X.25 DTE, configure the Passport 4400 unit to operate as DCE. The Passport 4400 unit encapsulates the X.25 data according to FRF3.1 (Frame Relay Forum, June 22, 1995) and ANSI T1.617a 1994 Annex G. The link between the Passport 4400 unit and the FRAD must be frame relay. One frame relay DLCI handles all X.25 calls between the Passport 4400 unit and the X.25 devices connected to the FRAD.
For this application, you must configure the physical ports on the Passport 4400 unit for X.25 services. Also, you must establish a PVC between the Passport 4400 unit and the FRAD. And, you must configure virtual ports to handle the X.25 connections across the WAN.
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