Integrated services digital network module

• US 4,866,703 A
• Filed: 12/28/1987
• Issued: 09/12/1989
• Est. Priority Date: 12/28/1987
• Status: Expired due to Fees

• Current Assignee: AG Communication Systems Corp. (Nokia Corporation)
• Original Assignee: AG Communication Systems Corp. (Nokia Corporation)
• Inventors: Gilbert, Mike, Black, James B., Walsh, Arthur L., Wiren, Gary, Wright, Steve A., Perry, Tom, Cordani, Mauro, Young, John S., Bruce, Donovan A.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Jung, Min
• Application Number:
  US07/138,102
• Time in Patent Office: 624 Days
• Field of Search: 370/110.1, 370/94, 370/60
• US Class Current: 370/352
• CPC Class Codes: H04Q 11/0428 Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
• CPC Class Codes: H04Q 2213/13093 Personal computer, PC
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13174 Data transmission, file transfer
• CPC Class Codes: H04Q 2213/13194 Four wire connection, transmission
• CPC Class Codes: H04Q 2213/13196 Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13205 Primary rate access, PRI
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13292 Time division multiplexing, TDM
• CPC Class Codes: H04Q 2213/13389 LAN, internet

Abstract

An Integrated Services Digital Network module includes a time division multiplexed switching network. Subscribers are connected to the time division multiplex network via a number of facility interface cards. These facility interface cards provide for two wire subscriber connection, four wire subscriber connection, T1 line connection and for three port conferencing arrangements. Originating and terminating multiplexers connect the facility interface cards to the time switching network. Another subsystem provides protocol interfaces for HDLC channels. Another subsystem provides interface to central office switching systems. Lastly, a general purpose computer and file computer system provide for the storage of database and form maintenance functions. Each subsystem is controlled via processor which is linked with each of the other processors by an ethernet local area network. This system provides both Primary Rate (23B+D) and Basic Rate (2B+D) interfaces to the subscribers.

Claims

1. An Integrated Services Digital Network module for digitally connecting a plurality of voice subscribers and a plurality of data subscribers to other public switching system subscribers, said Integrated Services Digital Network module comprising:

digital switching means for connecting originating ones of said pluralities of said voice and data subscribers in a time division multiplexing mode to terminating ones of said pluralities of said voice and data subscribers;

means for connecting said plurality of voice subscribers, said plurality of data subscribers and said other public switching system subscribers to said digital switching means for transmitting PCM voice samples and clear channel data between said pluralities of subscribers;

said digital switching means including time switching means for transferring said PCM voice samples and clear channel data between said pluralities of subscribers;

first processor means connected to said time switching means and operating to control said transfer of said PCM voice samples and clear channel data;

second processor means for storing and transmitting operating programs and database to said first processor;

local area network means connected to said first and to said second processor, and local area network means arranged to transfer said operating programs and database from said second processor to said first processor; and

said means for connecting including interface means connected to said other public switching system subscribers via, other switching systems and via other integrated service digital network modules, and to said digital switching means, said interface means providing for primary rate interface of 23B+D channels between said other switching systems and said Integrated Services Digital Network modules.

2. An Integrated Services Digital Network module as claimed in claim 1, wherein said means for connecting further includes T1 line means connected between said interface means and said Integrated Services Digital Network modules and said other public switching systems.

3. An Integrated Services Digital Network module for digitally connecting a plurality of voice subscribers and a plurality of data subscribers to other public switching system subscribers, said Integrated Services Digital Network module comprising:

digital switching means for connecting originating ones of said pluralities of said voice and data subscribers in a time division multiplexing mode to terminating ones of said pluralities of said voice and data subscribers;

means for connecting said plurality of voice subscribers, said plurality of data subscribers and said other public switching system subscribers to said digital switching means for transmitting PCM voice samples and clear channel data between said pluralities of subscribers;

said digital switching means including time switching means for transferring said PCM voice samples and clear channel data between said pluralities of subscribers;

first processor means connected to said time switching means and operating to control said transfer of said PCM voice samples and clear channel data;

second processor means for storing and transmitting operating programs and database to said first processor;

local area network means connected to said first and to said second processors, said local area network means arranged to transfer said operating programs and database from said second processor to said first processor; and

said means for connecting including interface means connected between said digital switching means and said pluralities of voice and data subscribers, said interface means providing basic rate interface of 2B+D channels between said plurality of voice and data subscribers and said Integrated Services Digital Network module.

4. An Integrated Services Digital Network module and claimed in claim 3, wherein said means for connecting further includes a four wire connection between said voice and data subscribers and said interface means.

5. An Integrated Services Digital Network module as claimed in claim 3, wherein said means for connecting further includes a two wire connection between said voice and data subscribers and said interface means.

6. An Integrated Services Digital Network module for digitally connecting a plurality of voice subscribers and a plurality of data subscribers to other public switching system subscribers, said Integrated Services Digital Network module comprising:

digital switching means for connecting originating ones of said pluralities of voice and data subscribers in a time division multiplexing mode to terminating ones of said pluralities of said voice and data subscribers;

means for connecting said plurality of voice subscribers, said plurality of data subscribers and said other public switching system subscribers to said digital switching means for transmitting PCM voice samples and clear channel data between said pluralities of subscribers;

said digital switching means including time switching means for transferring said PCM voice samples and clear channel data between said pluralities of subscribers;

first processor means connected to said time switching means and operating to control said transfer of said PCM voice samples and clear channel data;

second processor means for storing and transmitting operating programs and database to said first processor;

local area network means connected to said first and to said second processors, said local area network means arranged to transfer said operating programs and database from said second processor to said first processor; and

said means for connecting including interface means connecting between said subscribers and said digital switching means, said interface means providing for up to eight simultaneous three-port conference calls.

7. An Integrated Services Digital Network module for digitally connecting a plurality of voice subscribers and a plurality of data subscribers to other public switching system subscribers, said Integrated Services Digital Network module comprising:

digital switching means for connecting originating ones of said pluralities of said voice and data subscribers in a time division multiplexing mode to terminating ones of said pluralities of said voice and data subscribers;

means for connecting said plurality of voice subscribers, said plurality of data subscribers and said other public switching system subscribers to said digital switching means for transmitting PCM voice samples and clear channel data between said pluralities of subscribers;

originating multiplexing means;

terminating multiplexing means; and

said digital switching means including time switching means for transferring said PCM voice samples and clear channel data in incoming time slots to PCM voice samples and clear channel data in outgoing time slots, said time switching means connected to said originating and terminating multiplexing means;

first processor means connected to said time switching means and operating to control said time switching of said PCM voice samples and clear channel data from incoming to outgoing time slots;

second processor means for storing and transmitting operating programs and database to said first processor;

local area network means connected to said first and to said second processors, said local area network means arranged to transfer said operating programs and database from said second processor to said first processor.

8. An Integrated Services Digital Network module as claimed in claim 7, wherein there is further included clock regeneration means connected to said time switching means and to said originating and terminating multiplexing means, said clock regeneration means arranged to detect the frequency of said PCM voice samples and clear channel data transmitted to the digital switching means, providing therefrom a corresponding clock signal.

9. An Integrated Services Digital Network module for digitally connecting a plurality of voice subscribers and a plurality of data subscribers to other public switching system subscribers, said Integrated Services Digital Network module comprising:

digital switching means for connecting originating ones of said pluralities of said voice and data subscribers in a time division multiplexing mode to terminating ones of said pluralities of said voice and data subscribers;

means for connecting said plurality of voice subscribers, said plurality of data subscribers and said other public switching system subscribers to said digital switching means for transmitting PCM voice samples and clear channel data between said pluralities of subscribers;

protocol means connected to said digital switching means, said protocol means operating to receive HDLC formatted data from said digital switching means and to transmit HDLC formatted data to said digital switching means;

first processor means connected to said protocol means, said processor means controlling the conversion of PCM voice samples and clear channel data to HDLC format, and alternatively said processor means controlling the conversion from said HDLC format to PCM voice samples and clear channel data;

second processor means for storing and transmitting operating programs and database to said first processor; and

local area network means connected to said first and to said second processors, said local area network means arranged to transfer said operating programs and database from said second processor to said first processors.

10. An Integrated Services Digital Network module for digitally connected a plurality of voice subscribers and a plurality of data subscribers to other public switching system subscribers, said Integrated Services Digital Network module comprising:

digital switching means for connecting originating ones of said pluralities of said voice and data subscribers in a time division multiplexing mode to terminating ones of said pluralities of said voice and data subscribers;

means for connecting said plurality of voice subscribers, said plurality of data subscribers and said other public switching system subscribers to said digital switching means for transmitting PCM voice samples and clear channel data between said pluralities of subscribers;

remote data link means connected to said digital switching means, said remote data link means transmitting and receiving data through said digital switching means to and from other public switching systems

first processor means connected to said remote data link means for controlling said transmission and reception of PCM voice and clear channel data to and from other public switching systems;

second processor means for storing and transmitting operating programs and database to said first processor; and

local area network means connected to said first and to said second processors, said local area network means arranged to transfer said operating programs and database from said second processor to said first processor.

11. An Integrated Services Digital Network module for digitally connecting a plurality of voice subscribers and a plurality of data subscribers to other public switching system subscribers, said Integrated Services Digital Network module comprising:

digital switching means for connecting originating ones of said pluralities of said voice and data subscribers in a time division multiplexing mode to terminating ones of said pluralities of said voice and data subscribers;

means for connecting said plurality of voice subscribers, said plurality of data subscribers and said other public switching system subscribers to said digital switching means for transmitting PCM voice samples and clear channel data between said pluralities of subscribers;

originating multiplexing means;

terminating multiplexing means;

said digital switching means including time switching means for transferring said PCM voice samples and clear channel data in incoming time slots to PCM voice samples and clear channel data in outgoing time slots, said time switching means connected to said originating and terminating multiplexing means;

first processor means connected to said time switching means and operating to control said time switching of said voice samples and data from incoming to outgoing time slots;

second processor means, and a plurality of associated processors, said second processor means storing and transmitting operating programs and database to said associated processors;

local area network means for transferring data between said associated processors, said local area network means connected to said first processor means and to said second processor means, for transmitting said operating programs and said database to said first processor means.

12. An Integrated Services Digital Network module as claimed in claim 11, wherein there is further included:

third processor means connected to said local area network means and operating to assist said first processor means to control said time switching of said voice samples and said data from said incoming to said outgoing time slots; and

said third processor means being connected to said second processor means via said local area network means to receive said transmitted operating programs and database.

13. An Integrated Services Digital Network module as claimed in claim 12, said second processor means including fourth processor means connected to said local area network means, said fourth processor means transmitting said database to said third processor means.

14. An Integrated Services Digital Network module as claimed in claim 13, said second processor means including fifth processor means connected to said local area network means said fifth processor means transmitting said operating programs to said third processor means.

15. An Integrated Services Digital Network module as claimed in claim 11, wherein there is further included:

protocol means connected to said digital switching means, said protocol means operating to receive HDLC formatted data from said digital switching means and to transmit HDLC formatted data to said digital switching means;

third processor means connected to said protocol means, said processor means controlling said conversion of PCM voice samples and clear channel data to HDLC formatted data, and alternatively said processor means controlling said conversion from said HDLC formatted data to PCM voice samples and clear channel data; and

said third processor means connected to said second processor means via said local area network means to receive said transmitted operating programs and database.

16. An Integrated Services Digital network module as claimed in claim 15, said second processor means including fourth processor means connected to said local area network means, said fourth processor means transmitting said database to said third processor means.

17. An Integrated Services Digital Network module as claimed in claim 16, said second processor means including fifth processor means connected to said local area network means and fifth processor means transmitting said operating programs to said third processor means.

18. An Integrated Services Digital Network module as claimed in claim 11, wherein there is further included:

remote data link means connected to said digital switching means, said remote data link means transmitting and receiving data through said digital switching means to and from other public switching systems;

third processor means connected to said remote data link means for controlling said transmission and reception of data to and from other public switching systems; and

said third processor means connected to said second processor means via said local area network means to receive said transmitted operating programs and database.

19. An Integrated Services Digital network module as claimed in claim 18, said second processor means including fourth processor means connected to said local area network means, said fourth processor means transmitting said database to said third processor means.

20. An Integrated Services Digital Network module as claimed in claim 19, said second processor means including fifth processor means connected to said local area network means said fifth processor means transmitting said operating programs to said third processor means.

21. An Integrated Services Digital Network module as claimed in claim 11, said local area network means including ethernet local area network means.

22. An Integrated Services Digital Network module as claimed in claim 21, said ethernet local area network means including an INTELLINK local area network.

23. An Integrated Services Digital Network module as claimed in claim 11, said second processor means including third processor means connected to said local area network means, said third processor means providing Input/Output to an attendant.