The nice thing about Frame Relay is that it's cheaper than a [DS1|DS1/T1] for similar speed. Since Frame Relay works over existing [digital circuit|digital circuits], rather than requiring a new one to be installed, an [ISP] has a considerably lower cost with regard to line charges.

Frame Relay is done by many [ISP|ISPs], not just [AT&T]. The data is assembled into variable-sized [packet|packets], and routed to its destination through possibly many "[hop|hops]" through various existing [digital circuit|digital circuits], owned by the local [telco]. This makes Frame Relay's [bandwidth] dependent upon the available [bandwidth] of the circuits over which it travels. Frame Relay can also induce delays in data transmission, caused both by the packet assembly process, and by any bandwidth restrictions in its path.

These [caveat|caveats] taken into account, Frame Relay is still an excellent choice for [connectivity].