Shared T1/E1 signaling bit processor

• US 20040131088A1
• Filed: 01/08/2003
• Published: 07/08/2004
• Est. Priority Date: 01/08/2003
• Status: Abandoned Application

• Current Assignee: ADTRAN Incorporated (ADTRAN Holdings, Inc.)
• Original Assignee: ADTRAN Incorporated (ADTRAN Holdings, Inc.)
• Inventors: Moore, Clarke Edgar, Wright, Dwight Edwin
• Application Number:
  US10/338,461
• Publication Number:
  US 20040131088A1
• Time in Patent Office: Days
• US Class Current: 370/523
• CPC Class Codes: H04J 3/12 Arrangements providing for calling or supervisory signals
• CPC Class Codes: H04J 3/1623 Plesiochronous digital hierarchy [PDH]
• CPC Class Codes: H04J 3/1635 Format conversion, e.g. CEPT/US

Abstract

A shared T1/E1 signaling bit processor interfaces with either T1 or E1 traffic, and controllably performs robbed bit signal extraction and insertion for T1/E1 signaling protocol using a common set of input/output circuitry and associated decode/control logic therefor. A receiver subsystem controllably samples and extracts signaling bits from selected time slots within serial frames of data incoming from the network to the DTE for delivery to the control processor; a transmitter subsystem controllably inserts signaling bits into selected signaling channels of serial frames of data outgoing from the DTE to the network.

Claims

1. A communication apparatus for interfacing robbed signaling bits with respect to serial digital communication signals transported over a serial communication path comprising:

a signaling bit capture memory that is configured to receive and store signaling bits extracted from serial digital communication signals having different signaling protocols; and

a receiver subsystem processor configured to be coupled with said serial communication path and said signaling bit capture memory and being operative to controllably extract robbed bit signals from serial digital communication signals having any of said different signaling protocols and stored extracted robbed bit signals in said signaling bit capture memory.

2. The communication apparatus according to claim 1, further including a transmitter subsystem processor configured to be coupled with said serial communication path and being operative to controllably perform robbed bit signal insertion into serial digital communication signals having any of said different signaling protocols.

3. The communication apparatus according to claim 2, wherein said transmitter subsystem processor includes a common memory into which signaling bits to be inserted into serial digital communication signals having any of said different signaling protocols are controllably stored and read out for insertion into robbed signaling bit locations of said serial digital communication signals.

4. The communication apparatus according to claim 2, wherein said different signaling protocols include T1 and E1 digital communication signal protocols.

5. The communication apparatus according to claim 2, wherein said a signaling bit capture memory of said receiver subsystem processor includes a register into which robbed signaling bits contained in said serial digital communication signals are selectively written, in accordance with the operation of a robbed signaling bit extraction decoder, which is configured to monitor said serial digital communication signals and to identify locations of signaling bits therein based upon a prescribed set of signaling protocol, frame, channel and signaling bit location relationships supplied thereto.

6. The communication apparatus according to claim 3, wherein said common memory of said transmitter subsystem processor includes a register into which signaling bits are controllably stored for controlled insertion into said serial digital communication signals, and are read out therefrom and controllably multiplexed into said serial digital communication signals in accordance with the operation of an insertion decoder, which is configured to monitor said serial digital communication signals and to identify locations of signaling bits therein based upon a prescribed set of signaling protocol, frame, channel and signaling bit location relationships supplied thereto.

7. The communication apparatus according to claim 1, wherein said receiver subsystem processor is operative to controllably overwrite selected bits of said serial digital communication signals.

8. The communication apparatus according to claim 2, wherein said transmitter subsystem processor is operative to controllably overwrite selected bits of said serial digital communication signals.

9. A communication apparatus for interfacing robbed signaling bits with respect to serial digital communication signals transported over a serial communication path comprising:

a signaling bit memory that is configured to receive and store signaling bits for insertion into serial digital communication signals having any of a plurality of different signaling protocols; and

a transmitter configured to be coupled with said serial communication path and said signaling bit memory and being operative to controllably perform robbed bit signal insertion from said memory into serial digital communication signals having any of said plurality of different signaling protocols.

10. The communication apparatus according to claim 9, wherein said signaling bit memory of said transmitter includes a register into which signaling bits are controllably stored for controlled insertion into said serial digital communication signals, and are read out therefrom and controllably multiplexed into said serial digital communication signals in accordance with the operation of an insertion decoder, which is configured to monitor said serial digital communication signals and to identify locations of signaling bits therein based upon a prescribed set of signaling protocol, frame, channel and signaling bit location relationships supplied thereto.

11. The communication apparatus according to claim 9, wherein said different signaling protocols include T1 and E1 digital communication signal protocols.

12. A method for interfacing robbed signaling bits with respect to serial digital communication signals transported over a serial communication path comprising the steps of:

(a) providing a signaling bit capture memory that is configured to receive and store signaling bits extracted from serial digital communication signals having different signaling protocols; and

(b) performing robbed bit signal extraction from serial digital communication signals transported over said serial communication path having any of said differing signaling protocols and storing said signaling bits in aid signaling bit capture memory;

(c) providing a signaling bit read out memory which is configured to store signaling bits for insertion into serial digital communication signals having any of said different signaling protocols; and

(d) controllably inserting signaling bits stored in said signaling bit read out memory in step (c) into serial digital communication signals having any of said different signaling protocols.

13. The method according to claim 12, wherein said different signaling protocols include T1 and E1 digital communication signal protocols.

14. The method according to claim 12, wherein said signaling bit capture memory includes a register into which signal bits contained in said serial digital communication signals are selectively written in step (a), in accordance with the operation of an extraction decoder that monitors said serial digital communication signals and identifies locations of signaling bits therein based upon a prescribed set of signaling protocol, frame, channel and signaling bit location relationships supplied thereto.

15. The method according to claim 12, wherein said signaling bit read out memory includes a register into which signaling bits are controllably stored for controlled insertion into said serial digital communication signals, and are read out therefrom and controllably multiplexed into said serial digital communication signals in accordance with the operation of an insertion decoder that monitors said serial digital communication signals and identifies locations of signaling bits therein based upon a prescribed set of signaling protocol, frame, channel and signaling bit location relationships supplied thereto.

16. The method according to claim 12, wherein step (a) further includes controllably overwriting selected bits of said serial digital communication signals.

17. The method according to claim 12, wherein step (d) further includes controllably overwriting selected bits of said serial digital communication signals.