In a two step dialing procedure the customer first dials a local telephone number of the Inet exchange to get connected to Inet after which he can establish call to any other customer of Inet or overseas data networks. This does not require a leased line from the Inet exchange to the customer's premises. V.22 bis or V.32 bis. Frame Relay Service Frame Relay service is available only from Group A and Group B cities. It can be used for providing high speed connectivity between LANs in different cities.
Frame relay is a modified form of packet switching service.
It provides error free data circuits with capability of band-width on demand. X.29, X.32 and X.75.