(cid:84)(cid:101)(cid:99)(cid:104)(cid:110)(cid:105)(cid:99)(cid:97)(cid:108)(cid:32)(cid:82)(cid:101)(cid:112)(cid:111)(cid:114)(cid:116)
`(cid:84)(cid:82)(cid:45)(cid:48)(cid:48)(cid:49)
`(cid:65)(cid:68)(cid:83)(cid:76)(cid:32)(cid:70)(cid:111)(cid:114)(cid:117)(cid:109)(cid:32)(cid:83)(cid:121)(cid:115)(cid:116)(cid:101)(cid:109)
`(cid:82)(cid:101)(cid:102)(cid:101)(cid:114)(cid:101)(cid:110)(cid:99)(cid:101)(cid:32)(cid:77)(cid:111)(cid:100)(cid:101)(cid:108)
`
`(cid:77)(cid:97)(cid:121)(cid:32)(cid:49)(cid:57)(cid:57)(cid:54)
`
`(cid:65)(cid:98)(cid:115)(cid:116)(cid:114)(cid:97)(cid:99)(cid:116)
`
`(cid:84)(cid:104)(cid:105)(cid:115)(cid:32)(cid:116)(cid:101)(cid:99)(cid:104)(cid:110)(cid:105)(cid:99)(cid:97)(cid:108)(cid:32)(cid:114)(cid:101)(cid:112)(cid:111)(cid:114)(cid:116)(cid:32)(cid:32)(cid:112)(cid:114)(cid:101)(cid:115)(cid:101)(cid:110)(cid:116)(cid:115)(cid:32)(cid:97)(cid:110)(cid:32)(cid:65)(cid:68)(cid:83)(cid:76)(cid:45)(cid:98)(cid:97)(cid:115)(cid:101)(cid:100)(cid:32)(cid:83)(cid:121)(cid:115)(cid:116)(cid:101)(cid:109)(cid:32)(cid:82)(cid:101)(cid:102)(cid:101)(cid:114)(cid:101)(cid:110)(cid:99)(cid:101)(cid:32)(cid:77)(cid:111)(cid:100)(cid:101)(cid:108)(cid:32)(cid:97)(cid:110)(cid:100)(cid:32)(cid:100)(cid:101)(cid:102)(cid:105)(cid:110)(cid:101)(cid:115)(cid:32)(cid:97)(cid:108)(cid:108)(cid:32)(cid:114)(cid:101)(cid:108)(cid:101)(cid:118)(cid:97)(cid:110)(cid:116)
`(cid:105)(cid:110)(cid:116)(cid:101)(cid:114)(cid:102)(cid:97)(cid:99)(cid:101)(cid:115)(cid:32)(cid:112)(cid:114)(cid:101)(cid:115)(cid:101)(cid:110)(cid:116)(cid:32)(cid:105)(cid:110)(cid:32)(cid:97)(cid:110)(cid:32)(cid:65)(cid:68)(cid:83)(cid:76)(cid:32)(cid:65)(cid:99)(cid:99)(cid:101)(cid:115)(cid:115)(cid:32)(cid:78)(cid:101)(cid:116)(cid:119)(cid:111)(cid:114)(cid:107)(cid:46)
`
`Dish
`Exhibit 1021, Page 1
`
`

`

`ADSL Forum System Reference Model
`
`ADSL ForumTR-001
`
`ADSL Forum System Reference Model
`TR-001
`May 1996
`
`©1996 Asymmetric Digital Subscriber Line Forum. All Rights Reserved.
`ADSL Forum technical reports may be copied, downloaded, stored on a server or otherwise re-
`distributed in their entirety only.
`
`Notwithstanding anything to the contrary, The ADSL Forum makes no representation or
`warranty, expressed or implied, concerning this publication, its contents or the completeness,
`accuracy, or applicability of any information contained in this publication. No liability of any
`kind shall be assumed by The ADSL Forum as a result of reliance upon any information
`contained in this publication. The ADSL Forum does not assume any responsibility to update or
`correct any information in this publication.
`
`The receipt or any use of this document or its contents does not in any way create by implication
`or otherwise any express or implied license or right to or under any patent, copyright, trademark
`or trade secret rights which are or may be associated with the ideas, techniques, concepts or
`expressions contained herein.
`
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`2
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`Exhibit 1021, Page 2
`
`

`

`ADSL Forum System Reference Model
`
`ADSL ForumTR-001
`
`ADSL Forum System Reference Model
`
`1.0 Overall Network and ADSL
`
`The ADSL Forum develops technical guidelines for architectures, interfaces, and
`protocols for telecommunications networks incorporating ADSL transceivers. The
`overall network diagram below describes the network elements incorporated in
`multimedia communications, shows the scope of the Forum's work, and suggests a group
`of transport configurations ADSL will encounter as networks migrate from Synchronous
`Transfer Mode (STM) to Asynchronous Transfer Mode (ATM).
`
`Private
`Network
`
`Public
`Network
`
`Premises
`Network
`
`ADSL Access Network
`
`OS
`
`OS
`
`Service
`Systems
`
`On-line Services
`Internet Access
`LAN Access
`Interactive Video
`Video Conf
`
`Broadband
`Network
`
`Narrowband
`Network
`
`Packet
`Network
`
`Access
`Node
`
`ATU-C
`
`ADSL
`
`PDN
`
`ATU-R
`
`ADSL
`
`SM
`Settop
`
`SM
`PC I/O
`
`TE(s)
`TV
`
`TE(s)
`PC
`
`SM
`ISDN
`
`TE(s)
`ISDN
`
`ATM
`
`ATM
`
`STM
`
`Packet
`
`ATM
`
`Transport Modes
`
`STM
`Packet
`
`ADSL Asymmetric Digital Subscriber Line
`ATM Asynchronous Transfer Mode
`OS
`Operations System
`PDN Premises Distribution Network
`SM
`Service Module
`
`STM Synchronous Transfer Mode
`TE
`Terminal Equipment
`See System Reference Model for
`reference point definitions
`
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`
`3
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`Dish
`Exhibit 1021, Page 3
`
`

`

`ADSL Forum System Reference Model
`
`ADSL ForumTR-001
`
`2.0
`
`System Reference Model
`
`VC
`
`VA
`
`U-C2
`
`U-C
`
`U-R
`
`U-R2
`
`T-SM
`
`T
`
`Splitter
`
`Loop
`
`ATU-R
`
`POTS-C
`
`POTS-R
`
`PSTN
`
`Phone(s)
`
`Premises
`Distribution
`Network
`
`B
`
`T.E.
`
`T.E.
`
`T.E.
`
`T.E.
`
`Digital
`Broadcast
`
`Broadband
`Network
`
`Narrowband
`Network
`
`Network
`Management
`
`Definitions
`
`ATU-C
`
`ATU-C
`
`ATU-C
`
`ATU-C
`
`Access
`Node
`
`ATU-C: ADSL Transmission Unit at the network end. The ATU-C may be integrated within
`an Access Node.
`
`ATU-R: ADSL transmission Unit at the customer premises end. The ATU-R may be
`integrated within an SM.
`
`Access Node: Concentration point for Broadband and Narrowband data. The Access Node may
`be located at a Central Office or a remote site. Also, a remote Access Node may
`subtend from a central access node.
`
`B:
`
` Auxiliary data input (such as a satellite feed) to Service Module (such as a Set Top
`Box).
`
`Broadcast: Broadband data input in simplex mode (typically broadcast video).
`
`Broadband Network: Switching system for data rates above 1.5/2.0 Mbps.
`
`Loop:
`
`Twisted-pair copper telephone line. Loops my differ in distance, diameter, age, and
`transmssion characteristics depending on network.
`
`Narrowband Network: Switching system for data rates at or below 1.5/2.0 Mbps.
`
`POTS:
`
`Plain Old Telephone Service.
`
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`
`4
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`Exhibit 1021, Page 4
`
`

`

`ADSL Forum System Reference Model
`
`ADSL ForumTR-001
`
`POTS-C: Interface between PSTN and POTS splitter at network end.
`
`POTS-R: Interface between phones and POTS splitter at premises end.
`
`PDN:
`
`Premises Distribution Network: System for connecting ATU-R to Service Modules.
`May be point-to-point or multipoint; may be passive wiring or an active network.
`Multipoint may be a bus or star.
`
`PSTN:
`
`Public Switched Telephone Network.
`
`SM:
`
`Service Module: Performs terminal adaptation functions. Examples are set top
`boxes, PC interfaces, or LAN router.
`
`Splitter: Filters which separate high frequency (ADSL) and low frequency (POTS) signals at
`network end and premises end. The splitter may be integrated into the ATU,
`physically separated from the ATU, or divided between high pass and low pass, with
`the low pass function physically separated from the ATU. The provision of POTS
`splitters and POTS-related functions is optional.
`
`T-SM:
`
`Interface between ATU-R and Premises Distribution Network. May be same as T
`when network is point-to-point passive wiring. An ATU-R may have more than one
`type of T-SM interface implemented (e.g., a T1/E1 connection and an Ethernet
`connection). The T-SM interface may be integred within a Service Module.
`
`T:
`
`U-C:
`
`U-C2:
`
`U-R:
`
`U-R2:
`
`VA:
`
`VC:
`
`12/95
`
`Interface between Premises Distribution Network and Service Modules. May be
`same as T-SM when network is point-to-point passive wiring. Note that T interface
`may disappear at the physical level when ATU-R is integrated within a Service
`Module.
`
`Interface between Loop and POTS Splitter on the network side Defining both ends of
`the Loop interface separately arises because of the asymmetry of the signals on the
`line.
`
`Interface between POTS splitter and ATU-C. Note that at present ANSI T1.413 does
`not define such an interface and separating the POTS splitter from the ATU-C
`presents some technical difficulties in standardizing this interface.
`
`Interface between Loop and POTS Splitter on the premises side.
`
`Interface between POTS splitter and ATU-R. Note that at present ANSI T1.413 does
`not define such an interface and separating the POTS splitter from the ATU-R
`presents some technical difficulties in standardizing the interface.
`
`Logical interface between ATU-C and Access Node. As this interface will often be
`within circuits on a common board, the ADSL Forum does not consider physical VA
`interfaces. The V interface may contain STM, ATM, or both transfer modes. In the
`primitive case of point-to-point connection between a switch port and an ATU-C (that
`is, a case without concentration or multiplexing), then the VA and VC interfaces
`become identical (alternatively, the VA interface disappears).
`
`Interface between Access Node and network. May have multiple physical
`connections (as shown) although may also carry all signals across a single physical
`
`5
`
`Dish
`Exhibit 1021, Page 5
`
`

`

`ADSL Forum System Reference Model
`
`ADSL ForumTR-001
`
`connection. A digital carrier facility (e.g., a SONET or SDH extension) may be
`interposed at the VC interface when the access node and ATU-Cs are located at a
`remote site. Interface to the PSTN may be a universal tip-ring interface or a
`multiplexed telephony interface such as specified in Bellcore TR-08 or TR-303, ITU-
`T G.964, or ETSI 300 324. The broadband segment of the VC interface may be STM
`switching, ATM switching, or private line type connections.
`
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`6
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`Dish
`Exhibit 1021, Page 6
`
`