CA2444231A1 - Network termination equipment - Google Patents
Network termination equipment Download PDFInfo
- Publication number
- CA2444231A1 CA2444231A1 CA002444231A CA2444231A CA2444231A1 CA 2444231 A1 CA2444231 A1 CA 2444231A1 CA 002444231 A CA002444231 A CA 002444231A CA 2444231 A CA2444231 A CA 2444231A CA 2444231 A1 CA2444231 A1 CA 2444231A1
- Authority
- CA
- Canada
- Prior art keywords
- atm
- termination equipment
- network
- network termination
- layer processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Abstract
An architecture, as well as various components, of an asynchronous transfer mode (ATM) subscriber access multiplexer (ASAM) system can be implemented using an xDSL (x-Digital Subscriber Line) using DMT (Discrete Multitone) or CAP (Carrierless Amplitude Phase Modulation) between a plurality of subscribers and a corresponding plurality of line termination equipment in a shelf that also includes network termination equipment for connection to an ATM network. The line termination and network termination equipment are interconnected by a bus internal to the shelf for providing subscriber access. Separate lowpass filters are provided at each end of a twisted wire pair between the shelf and each subscriber equipment. A shelf can be used as a hub for connecting to a remote shelf that includes the line termination equipment for connection to subscribers.
Although the internal bus of the shelf is shown in a non-redundant embodiment, an increased level of equipment protection can be provided by placing one half of a redundant equipment pair in one shelf and the other half in the other shelf and sharing network termination equipment between such shelves.
Although the internal bus of the shelf is shown in a non-redundant embodiment, an increased level of equipment protection can be provided by placing one half of a redundant equipment pair in one shelf and the other half in the other shelf and sharing network termination equipment between such shelves.
Claims (18)
1. Network termination equipment for use in a shelf of a telecommunications system, said network termination equipment for connection to an asynchronous transfer mode (ATM) network and to a plurality of line termination equipment also for use in said shelf for connection to subscriber equipment, said network termi-nation equipment comprising:
physical medium termination equipment for interfacing to a physical medium by means of a serial input/output connection to said ATM network for providing a parallel input/output;
transmission conveyance means connected to said parallel input/output for recovering/mapping ATM cells from/to frames of a transport format of said serial input/output;
ATM layer processing means connected to said transmission conveyance means for layer processing downstream ATM cells recovered by said transmission conveyance means and for providing up stream ATM cells to said transmission conveyance means; and an ATM bus interface responsive to downstream ATM
cells from said ATM layer processing means for providing said downstream ATM cells with a guard byte for an ATM bus in said shelf and responsive to upstream ATM cells with a guard byte for providing said upstream cells to said ATM
layer processing means without said guard byte.
physical medium termination equipment for interfacing to a physical medium by means of a serial input/output connection to said ATM network for providing a parallel input/output;
transmission conveyance means connected to said parallel input/output for recovering/mapping ATM cells from/to frames of a transport format of said serial input/output;
ATM layer processing means connected to said transmission conveyance means for layer processing downstream ATM cells recovered by said transmission conveyance means and for providing up stream ATM cells to said transmission conveyance means; and an ATM bus interface responsive to downstream ATM
cells from said ATM layer processing means for providing said downstream ATM cells with a guard byte for an ATM bus in said shelf and responsive to upstream ATM cells with a guard byte for providing said upstream cells to said ATM
layer processing means without said guard byte.
2. The network termination equipment of claim wherein said physical medium to termination equipment includes an optical interface.
3. The Network termination equipment of claim 1, wherein said physical medium termination equipment includes means for locking onto a received downstream clock signal and means for providing a transmit clock in an upstream direction.
4. The network termination equipment of claim 1, wherein said transmission conveyance means includes frame alignment recovery means for use in a downstream direction and frame generation means for use in an upstream direction.
5. The network termination equipment of claim 4, wherein said transmission conveyance means further comprises descrambling/scrambling means for descrambling/
scrambling STM1/STS3c signals.
scrambling STM1/STS3c signals.
6. The network termination equipment of claim 1, wherein said ATM layer processing means includes ATM
cell extraction/insertion means, ATM cell header error control (HEC) checking and ATM layer processing plus cell rate decoupling.
cell extraction/insertion means, ATM cell header error control (HEC) checking and ATM layer processing plus cell rate decoupling.
7. Network termination equipment, for connec-tion to an asynchronous transfer mode (ATM) network, said network termination equipment comprising:
physical medium termination equipment for interfacing to a physical medium by means of a serial input/output connection to said ATM network for providing a parallel input/output;
transmission conveyance means connected to said parallel input/output for recovering/mapping ATM cells from/to frames of a transport format of said serial input/output;
ATM layer processing means connected to said transmission conveyance means for layer processing downstream ATM cells recovered by said transmission conveyance means and for providing upstream ATM cells to said transmission conveyance means; and an ATM bus interface responsive to downstream ATM
cells from said ATM layer processing means for providing said downstream ATM cells with a guard byte for an ATM bus in said shelf and responsive to upstream ATM cells with a guard byte for providing said upstream cells to said ATM
layer processing means without said guard byte.
physical medium termination equipment for interfacing to a physical medium by means of a serial input/output connection to said ATM network for providing a parallel input/output;
transmission conveyance means connected to said parallel input/output for recovering/mapping ATM cells from/to frames of a transport format of said serial input/output;
ATM layer processing means connected to said transmission conveyance means for layer processing downstream ATM cells recovered by said transmission conveyance means and for providing upstream ATM cells to said transmission conveyance means; and an ATM bus interface responsive to downstream ATM
cells from said ATM layer processing means for providing said downstream ATM cells with a guard byte for an ATM bus in said shelf and responsive to upstream ATM cells with a guard byte for providing said upstream cells to said ATM
layer processing means without said guard byte.
8. The network termination equipment of claim 7, wherein said physical medium termination equipment includes an optical interface.
9. The network termination equipment of claim 7, wherein said physical medium termination equipment includes means for locking onto a received downstream clock signal and means for providing a transmit clock in an upstream direction.
10. The network termination equipment of claim 7, wherein said transmission conveyance means includes frame alignment recovery means for use in a downstream direction and frame generation means for use in an upstream direction.
11. The network termination equipment of claim 10, wherein said transmission conveyance means further comprises descrambling/scrambling means for descrambling/
scrambling STM1/STS3c signals.
scrambling STM1/STS3c signals.
12. The network termination equipment of claim 7, wherein said ATM layer processing means includes ATM
cell extraction/insertion means, ATM cell header error control (HEC) checking and ATM layer processing plus cell rate decoupling.
cell extraction/insertion means, ATM cell header error control (HEC) checking and ATM layer processing plus cell rate decoupling.
13. Network termination equipment for use in a shelf of a telecommunication system, said network termination equipment for connection to an asynchronous transfer mode (ATM) network, said network termination equipment comprising:
physical medium termination equipment for interfacing to a physical medium by means of a serial input/output connection to said ATM network for providing a parallel input/output;
transmission conveyance means connected to said parallel input/output for recovering/mapping ATM cells from/to frames of a transport format of said serial input/output;
ATM layer processing means connected to said transmission conveyance means for layer processing downstream ATM cells recovered by said transmission conveyance means and for providing upstream ATM cells to said transmission conveyance means; and an ATM bus interface responsive to downstream ATM
cells from said ATM layer processing means for providing said downstream ATM cells with a guard byte for an ATM bus in said shelf and responsive to upstream ATM cells with a guard byte for providing said upstream cells to said ATM
layer processing means without said guard byte.
physical medium termination equipment for interfacing to a physical medium by means of a serial input/output connection to said ATM network for providing a parallel input/output;
transmission conveyance means connected to said parallel input/output for recovering/mapping ATM cells from/to frames of a transport format of said serial input/output;
ATM layer processing means connected to said transmission conveyance means for layer processing downstream ATM cells recovered by said transmission conveyance means and for providing upstream ATM cells to said transmission conveyance means; and an ATM bus interface responsive to downstream ATM
cells from said ATM layer processing means for providing said downstream ATM cells with a guard byte for an ATM bus in said shelf and responsive to upstream ATM cells with a guard byte for providing said upstream cells to said ATM
layer processing means without said guard byte.
14. The network termination equipment of claim 13, wherein said physical medium termination equipment includes an optical interface.
15. The network termination equipment of claim 13, wherein said physical medium termination equipment includes means for locking onto a received downstream clock signal and means for providing a transmit clock in an upstream direction.
16. The network termination equipment of claim 13, wherein said transmission conveyance means includes frame alignment recovery means for use in a downstream direction and frame generation means for use in an upstream direction.
17. The network termination equipment of claim 16, wherein said transmission conveyance means further comprises descrambling/scrambling means for descrambling/
scrambling STM1/STS3c signals.
scrambling STM1/STS3c signals.
18. The network termination equipment of claim 13, wherein said ATM layer processing means includes ATM
cell extraction/insertion means, ATM cell header error control (HEC) checking and ATM layer processing plus cell rate decoupling.
cell extraction/insertion means, ATM cell header error control (HEC) checking and ATM layer processing plus cell rate decoupling.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/891,145 | 1997-07-10 | ||
| US08/891,145 US6314102B1 (en) | 1997-07-10 | 1997-07-10 | Telecommunications system for providing both narrowband and broadband services to subscribers |
| CA002237145A CA2237145A1 (en) | 1997-07-10 | 1998-06-10 | Narrowband and broadband telecom system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002237145A Division CA2237145A1 (en) | 1997-07-10 | 1998-06-10 | Narrowband and broadband telecom system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2444231A1 true CA2444231A1 (en) | 1999-01-10 |
Family
ID=30001255
Family Applications (6)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002444419A Expired - Fee Related CA2444419C (en) | 1997-07-10 | 1998-06-10 | Telecommunications rack including shelves with nonredundant backplanes used redundantly |
| CA002444420A Expired - Fee Related CA2444420C (en) | 1997-07-10 | 1998-06-10 | Line termination equipment |
| CA002444236A Expired - Fee Related CA2444236C (en) | 1997-07-10 | 1998-06-10 | Replacable printed board assembly (pba) |
| CA002444418A Expired - Fee Related CA2444418C (en) | 1997-07-10 | 1998-06-10 | Telecommunications system and subscriber equipment therefor |
| CA002444239A Expired - Fee Related CA2444239C (en) | 1997-07-10 | 1998-06-10 | Housing for connection to both broadband and narrowband networks as a shelf in a telecommunications rack |
| CA002444231A Abandoned CA2444231A1 (en) | 1997-07-10 | 1998-06-10 | Network termination equipment |
Family Applications Before (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002444419A Expired - Fee Related CA2444419C (en) | 1997-07-10 | 1998-06-10 | Telecommunications rack including shelves with nonredundant backplanes used redundantly |
| CA002444420A Expired - Fee Related CA2444420C (en) | 1997-07-10 | 1998-06-10 | Line termination equipment |
| CA002444236A Expired - Fee Related CA2444236C (en) | 1997-07-10 | 1998-06-10 | Replacable printed board assembly (pba) |
| CA002444418A Expired - Fee Related CA2444418C (en) | 1997-07-10 | 1998-06-10 | Telecommunications system and subscriber equipment therefor |
| CA002444239A Expired - Fee Related CA2444239C (en) | 1997-07-10 | 1998-06-10 | Housing for connection to both broadband and narrowband networks as a shelf in a telecommunications rack |
Country Status (1)
| Country | Link |
|---|---|
| CA (6) | CA2444419C (en) |
-
1998
- 1998-06-10 CA CA002444419A patent/CA2444419C/en not_active Expired - Fee Related
- 1998-06-10 CA CA002444420A patent/CA2444420C/en not_active Expired - Fee Related
- 1998-06-10 CA CA002444236A patent/CA2444236C/en not_active Expired - Fee Related
- 1998-06-10 CA CA002444418A patent/CA2444418C/en not_active Expired - Fee Related
- 1998-06-10 CA CA002444239A patent/CA2444239C/en not_active Expired - Fee Related
- 1998-06-10 CA CA002444231A patent/CA2444231A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CA2444419A1 (en) | 1999-01-10 |
| CA2444418C (en) | 2007-01-09 |
| CA2444236A1 (en) | 1999-01-10 |
| CA2444239A1 (en) | 1999-01-10 |
| CA2444418A1 (en) | 1999-01-10 |
| CA2444239C (en) | 2005-01-18 |
| CA2444420C (en) | 2006-11-21 |
| CA2444420A1 (en) | 1999-01-10 |
| CA2444419C (en) | 2005-01-18 |
| CA2444236C (en) | 2007-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |