I've been trying to figure out if its possible to configure Frame Relay over a PRI ever since I was able to successfully configure an Adtran Atlas (simulating my frame cloud) to use 4 x v.35 and 1 x PRI interfaces for a full mesh cloud. I've seen the encapsulation frame relay option under dialer interfaces, but not under the serialN/N:23 interface. Some of the documentation out there also hints at being able to configure frame relay under ISDN (but not specifically under PRI). I've also seen IOS releases that have "Frame Relay Switched Virtual Circuits over ISDN" listed as a feature, but after installing these images I was still not able to apply a frame-relay encapsulation to my PRI. The documentation available typically doesnt spell out how it's done, what the caveats are, and any Cisco recommendations. Hopefully someone from the forum can enlighten me.
