ISDN interface
AssigneeAT&T Bell Laboratories
InventorsJames R. Brock, Steven M. Gelfond
Life of this patent
Estimating the term…
Abstract
Disclosed is a method and apparatus for transferring data in an Integrated Services Digital Network (ISDN) system. Certain system information bits are displaced into time slot zero to permit the transmission of the B2 channel bits in the same assigned time slots as the B1 channel. D channel bits are also assigned to unused time slots.
Claims17
In an ISDN loop carrier transmission system which provides three channels per customer line and uses a frame pattern including a plurality of time slots, a method for transmitting data comprising the steps of:
- transmitting the data from two of the channels for a single customer line in a single time slot;
- transmitting information concerning the system in the first time slot in the frame;
- and
- transmitting the data from the third channel in an otherwise unused additional time slot.
Apparatus for transmitting data in an ISDN loop carrier transmission system which provides three channels per customer line and which uses a frame pattern including a plurality of time slots comprising:
- means for placing the data from two of the channels for a single customer line in a single time slot;
- and
- means for placing the data from the third channel in an otherwise unused additional time slot.
Dependencies are inferred from the claim text.