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Customer premises ADSL modem requirements Table of contents 1
Scope/Field of application
2
2
Definitions
4
3 3.1 3.2 3.3
Requirements at the line-port of the ADSL modem ADSL layer 1 requirements ATM layer 2 requirements Protocol encapsulation
5 5 10 12
4 4.1 4.2 4.3
Requirements at the Ethernet ports of the ADSL modem Physical interface Functional requirements Performance requirements
12 12 12 13
5 5.1 5.2
General ADSL modem requirements Default settings Electrical safety
13 13 14
6 6.1 6.2 6.3 6.4 6.5 6.6 6.7
Bitstream PRO specific requirements ADSL layer 1 requirements ATM layer 2 requirements Requirements at the Ethernet ports of the DSL modems Performance requirements General DSL modem requirements Settings Electrical safety
16 17 18 19 20 20 20 21
7
Abbreviations/Acronyms
23
8
References
24
TeliaSonera Sweden TSS - Networks and Production
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Revision history 2004-12-15: Rev A. First version. 2005-10-17: Rev B. Main changes: • • • •
Up to 120 seconds for training allowed in auto-mode Performance requirements at Ethernet level changed Performance requirement on ADSL2+ updated with Broadband Forum figures Annex M auto-mode to be supported as default
2006-09-14: Rev C. Alcatel ISAM interoperability. 2008-06-27: Rev D. Bitstream PRO requirements and general overview of all requirements 2011-01-18: Rev E. Hardware information added for the DSLAM platforms. Bitrate requirements in CPE 3022 revised. 2011-05-13: Rev F. Requirements for VoIP and IPTV added.
1
Scope/Field of application
This document specifies a set of requirements for an ATU-R supporting different ADSL modes (e.g. ADSL2+). The specification aims to detail the basic connectivity requirements at the physical, ADSL, ATM and Ethernet level. This document specifies the requirements for an ATU-R using multi-protocol encapsulation of bridge protocols over ATM over ADSL over PSTN. All requirements in this specification assume that the ATU-R is configured in bridge mode. This does not prohibit the inclusion of additional functionality into the ATU-R, e.g. router or WLAN functionality. The objective is to ensure full interoperability between equipment from different vendors. ATU-C and ATU-R from different vendors with different hardware chips shall be fully interoperable with each other.
CPE 3001
Nokia D50 interoperability The ATU-R shall be interoperable with Nokia D50e type of DSLAM, with following line cards: eDMT8A3s, eDMT4f, eDMT8-1, eDMT8-2S
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CPE 3002
CPE 3003
CPE 3004
Alcatel ASAM interoperability The ATU-R shall be interoperable with Alcatel 7300 ASAM type of DSLAM, with following line cards: ADLT-L, ADLT-J, ABLT-D Ericsson EDA 1200 interoperability The ATU-R shall be interoperable with Ericsson EDA type of DSLAM, with following IPDSLAMs: EDN312xe, EDN612ef Alcatel ISAM interoperability The ATU-R shall be interoperable with Alcatel ISAM type of DSLAM, with following line cards: EBLT-E, EBLT-C, NALS-A 1
ADSL/ATM CPE / ATU-R
AR
ADSL functions
DSLAM 2
Bridge
Other Functionality
Ethernet
Figure 1 ADSL system functionality
Network Provider domain This document specifies two types of functionality for the ATU-R: -
Functionality related to the ATU-R and its interaction with the DSLAM, 1) in figure 1.
-
Functionality related to the interaction between ATU-R and Access Routers (AR) or other network elements e.g. gateways. The bridged Ethernet ATU-R is depicted as 2) in figure 1.
In figure 1, only a single customer interface is depicted. Some ATU-R may however support additional customer interfaces as stated in specific requirements Usually a POTS splitter is also needed. Requirements for the splitter are found in [13].
LAN functions
DTE
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2
Definitions Customer premises
Splitter
LE
Copper pair
ATUR
Pots
TE
DTE
Figure 2 ADSL system reference configuration
Reference configuration: The equipment stationed at the customer premises consists of a POTS splitter and a modem designated ATU-R. The ATU-R could be stand-alone equipment or be a part of the Data Terminal Equipment (DTE). The DTE could e.g. be a PC or local area equipment such as a router. The local exchange (LE) equipment contains the ATU-C and a splitter. The ATU-C is the counterpart to the ATU-R. The LE equipment is often called DSLAM. ATU-R: The term ATU-R is used when describing CPE functionality and performance. ETSI FB: Line impairment type. Details can be found in Broadband Forum TR067 [14] or in ETSI TS 101 388 [10]. ETSI Loop #1: Cable type. Details can be found in the ETSI TS 101 388 [10] or in the ITU-T Rec. G.996.1 [7]. ETSI Loop #2: Cable type. Details can be found in the ETSI TS 101 388 [10] or in the ITU-T Rec. G.996.1 [7]. Sync Time: Sync Time is the time interval from the moment when the modem starts Training, until the moment Showtime is achieved. Showtime: The state reached after Training is completed and data can be transmitted.
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3
Requirements at the line-port of the ADSL modem
3.1
ADSL layer 1 requirements
3.1.1 Physical interface The requirements CPE 3005 - CPE 3011 in this clause are specific for the protection of POTS and are based on ETSI ES 202 913 [11].
CPE 3005
DC resistance between wires The DC resistance between the A- and B-wire at the line port of the ATU-R shall be > 5 MΩ.
CPE 3006
DC resistance to earth The DC resistance between each wire and earth at the line port of the ATU-R shall be > 50 MΩ.
CPE 3007
Ringing impedance The impedance at 25 Hz between the A- and B-wire at the line port of the ATU-R shall be > 100 kΩ.
CPE 3008
CPE 3009
CPE 3010
CPE 3011
DC current during ringing The DC current drawn by the ATU-R line port during the ringing signal shall be < 0,6 mA when tested with a 25 Hz ringing voltage of 90 Vrms superimposed on 60 V DC. Unbalance about earth The unbalance about earth (LCL) at the line port of the ATU-R shall be >54 dB in the range 50-600 Hz and >60 dB in the range 600-3400 Hz. Impedance in the voice band The input impedance at the line port of the ATU-R when tested with a signal level of 1 Vrms superimposed on 9V DC shall be >10 kΩ at 200 Hz and 455 Hz and >1137 Ω at 4 kHz. RJ-11 The physical interface connecting the ATU-R to the splitter shall be an RJ-11 socket. Pin 3 and 4 shall be used for the ADSL signals. Pin 1, 2, 5 and 6 shall not be used.
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Figure 3 RJ-11 socket
3.1.2 CPE 3012
CPE 3013
CPE 3014
CPE 3015
CPE 3016
CPE 3017
Functional requirements ADSL1, Annex A The ATU-R shall follow the ADSL standard defined in ITU-T Rec. G.992.1 [1] including Annex A for ADSL over POTS. All modifications to [1] as specified in ETSI TS 101 388 [13] to cover the European deployment, shall apply. ADSL2, Annex A The ATU-R shall follow the ADSL2 standard defined in ITU-T Rec. G.992.3 [2] and [3] including Annex A ADSL2 over POTS. For regional requirements, the Europeanspecific parts shall apply. ADSL2, Annex M For ADSL2 the ATU-R shall follow Annex M defined in ITU-T Rec. G.992.3 [2] and [3]. For regional requirements, the European-specific parts shall apply. ADSL2+, Annex A The ATU-R shall follow the ADSL2+ standard defined in ITU-T Rec. G.992.5 [4] including Annex A for ADSL2+ over POTS. For regional requirements, the Europeanspecific parts shall apply. ADSL2+, Annex M For ADSL2+ the ATU-R shall follow the Annex M defined in ITU-T Rec. G.992.5 [4] and [5]. For regional requirements, the European-specific parts shall apply. Frequency division duplex The ATU-R shall be frequency division multiplexed according to ITU-T Rec. G.992.1 [1], G.992.3 [2] and G.992.5 [4].
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CPE 3018
3.1.3
CPE 3019
CPE 3020
CPE 3021
Handshake procedures The ATU-R shall follow the standard in ITU-T Rec. G.994.1 [6], which specifies the handshake procedures for digital subscriber line transceivers. Performance requirements Performance requirement for ADSL1 capable ATU-R (fast mode) The ATU-R shall conform to the transmission performance requirements given by Broadband Forum TR-067 clause A.2.3.2 [14], with exception for interleaved mode performance requirements. The DSLAM shall be set in ADSL1 automode. Performance requirement for ADSL2+ capable ATU-R (fast mode) The ATU-R shall conform to the transmission performance requirements given by Broadband Forum TR-100 clause A.2.5.4 Table A.2-22 [15] with the modifications given below. •
The DSLAM shall be set in auto-mode including ADSL1, ADSL2 A/L, ADSL2+ A.
•
No code violations (CV) shall be detected during SHOWTIME for any of the test cases.
Performance requirement for ADSL2+ capable ATU-R (interleaved mode with INP=2) The ATU-R shall conform to the transmission performance requirements given by Broadband Forum TR-100 clause A.2.5.4 Table A.2-23 [15] with the modifications given below. The DSLAM shall be set in auto-mode without Annex M. •
CPE 3022
No code violations (CV) shall be detected during SHOWTIME for any of the test cases.
Performance requirement for ADSL2+ capable ATU-R with Annex M (fast mode) The ATU-R shall be capable of providing at least the bit rate specified in the table below under the test conditions given by Broadband Forum TR-100 clause A.2.5.4 Table A.2-22 [15] with the modifications given below. The DSLAM shall be set in auto-mode.
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ADSL2+ under test in Broadband Forum TR-100 clause A.2.5.4 [15] is replaced with ADSL2+ Annex M.
•
No code violations (CV) shall be detected during SHOWTIME for any of the test cases.
•
The modem must train within a total of 120 seconds for auto-mode operation.
Dist (m)
Downstream, Annex M (kbit/s)
Upstream Annex M (kbit/s)
100
16000
2450
250
15100
2200
750
14200
2000
1250
12500
1700
1750
9200
1350
2500
3000
850
3250
100
300
ADSL 2+, Annex M performance requirements, fast and interleaved mode
CPE 3023
Performance requirement for ADSL2+ capable ATU-R with Annex M (interleaved mode with INP=2) The ATU-R shall be capable of providing at least the bit rates specified in the table 2 above under the test conditions given by Broadband Forum TR-100 clause A.2. 5.4 Table A.2-23 [15] with the modifications given below. The DSLAM shall be set in auto-mode. •
ADSL under test in Broadband Forum TR-100 clause A.2. 5.4 [15] is replaced with ADSL2+.
•
The bit rate requirements shall be as in CPE 3022.
•
No code violations (CV) shall be detected during SHOWTIME for each of the test cases.
•
The modem must train within a total of 120 seconds for auto-mode operation.
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Management and configuration requirements Physical layer management The ATU-R shall support all mandatory functions in ITU-T Rec. G.997.1 [8].
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N 14959-04 Support for INP and interleaving The ADSL2+ ATU-R shall at least support the INP/interleave combinations marked with grey in the tables below. The values in the grey cells are the maximum possible bitrates for each combination according to G.992.5 Amendment 1 [5] (downstream) and G.992.5 [4] (upstream).
CPE 3025
Downstream Max interleave delay 1*
0
0,5
1
2
4
8
16
29556
2
25718
4
27613
25718
21093
8
26042
22244
14455
8112
16
26042
22244
14455
8112
4024
4
8
16
Upstream Max interleave delay 1*
0
0,5
1
2
3520
2
3072
4
3264
1728
704
8
1792
832
320
64
16
1792
832
704
128
* 1 ms delay means Sp≤1 and Dp=1, see the ADSL standards
CPE 3026
Rate adaptation The ATU-R shall be capable to be configured for rate adaptive, margin adaptive or power adaptive mode of operation for both downstream and upstream directions. This shall be accomplished by control from ATU-C as specified in ITU-T Rec. G.997.1 [8].
3.2
ATM layer 2 requirements
3.2.1
Functional requirements
CPE 3027
ATM over ADSL The ATU-R shall transport ATM over ADSL, ADSL2 and ADSL2+ according to ITU-T Rec. G.992.1 [1], G.992.3 [2] and G.992.5 [4]. For cell transport, the ATM-specific parts shall apply.
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CPE 3028
UBR The ATU-R shall support ATM traffic class UBR.
CPE 3029
VBR-rt The ATU-R shall support ATM traffic class VBR-rt.
CPE 3030
VBR-nrt The ATU-R shall support ATM traffic class VBR-nrt.
CPE 3031
UBR bandwidth allocation The UBR QoS shall not reserve any bandwidth e.g. in the CAC-mechanism.
CPE 3032
Three prioritisation queues The ATU-R shall support traffic prioritisation with at least three separate queues in upstream direction.
CPE 3033
3.2.2 CPE 3034
Simultaneous VBR-rt, VBR-nrt and UBR It shall be possible to simultaneously use UBR, VBR-nrt and VBR-rt ATM traffic on different PVCs between the ATU-R and the ATU-C. Performance requirements Three simultaneous PVC The equipment shall support the possibility to set up at least three simultaneous PVCs between the ATU-R and the ATUC.
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CPE 3036
3.3 CPE 3037
Management and configuration requirements F5 loop back The ATM OAM F5 end-to-end loop-back functionality at virtual channel level according to ITU-T Rec. I.610 [12] shall be supported. OAM only on request OAM-cells shall only be sent from the ATU-R upon request from the ATU-C.
Protocol encapsulation RFC 2684, LLC The equipment shall support RFC 2684, Multiprotocol Encapsulation over ATM Adaptation Layer 5, section 5.2 LLC/SNAP Encapsulation of bridge protocols [17].
4
Requirements at the Ethernet ports of the ADSL modem
4.1
Physical interface
CPE 3038
4.2 CPE 3039
CPE 3040
ATU-R Ethernet port The ATU-R shall have at least one physical LAN-port (RJ45)
Functional requirements IEEE802.1d, Learning bridge The equipment shall support the IEEE 802.1d standard for transparent learning bridges. MAC addresses The learning bridge shall handle at least 255 MAC addresses.
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4.3 CPE 3041
CPE 3042
CPE 3043
Performance requirements Basic throughput for ATU-R’s The throughput in downstream direction shall be at least 6,5 Mbit/s for a packet size of 1500 with simultaneous upstream throughput of at least 0,45 Mbit/s for a packet size of 64 bytes, all on Ethernet level. High throughput ATU-R’s The throughput in downstream direction shall be at least 18 Mbit/s for a packet size of 1500 bytes with simultaneous upstream throughput of at least 0,60 Mbit/s for a packet size of 64 bytes, all on Ethernet level. High throughput ATU-R’s with extended uplink The throughput in downstream direction shall be at least 16 Mbit/s for packet sizes of 1500 bytes with simultaneous upstream throughput of at least 1,2 Mbit/s for a packet size of 64 bytes, all on Ethernet level.
5
General ADSL modem requirements
5.1
Default settings
CPE 3044
VP/VC service mapping The ATU-R shall have the following default VP/VC mapping per service : Service
VPI
VCI
ATM
Internet
8
35
UBR
IPTV
8
45
VBRnrt
VoIP
8
55
VBRrt
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5.2
Electrical safety All requirements in this area are provided here for information only. In the ordinances and standards referred to there are essential requirements, which are mandatory from a legal perspective.
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Ordinances concerning electrical equipment Ordinances, electrical safety For compliance with the ”Low Voltage Directive, 73/23/EEC” the following ordinances apply. The directive is mandatory for almost all electrical equipment for use at voltage ranges 501000 V AC or 75-1500 V DC. For equipment used in Sweden the voltage ranges are 0-1000 V AC and 0-1500 V DC. 1) Ordinance concerning Electrical Equipment; (SFS 1993:1068), in the Swedish Code of Statutes. 2) The National Electrical Safety Board’s Regulations concerning Certain Electrical Equipment; (ELSÄK-FS 2000:1).
CPE 3046
Equipment, which falls within the voltage ranges above, shall comply with the requirements stated in the ordinances and shall be accompanied by suppliers' declaration. NOTE. In the Ordinances there are essential requirements, which are legal and therefore mandatory.
5.2.2 CPE 3047
Standards Electrical safety, SS-EN 60 950 For mains and battery powered IT equipment connected to a telecommunications network the requirements stated in SS-EN 60 950 apply. The standard, in accordance with the ”principles of safety” given in its introduction, covers safety requirements and compliance criteria such as: 1. Protection of equipment users from hazards in the equipment. 2. Protection of service personnel working with the telecommunication network and other users of the telecommunication network, from hazardous conditions on the telecommunication network resulting from the connection of the equipment. 3. Protection of equipment users from voltages in the telecommunication network. NOTE. In the standards there are essential requirements, which are legal and therefore mandatory.
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6
Bitstream PRO specific requirements The CPE has the following main characteristics •
Support for ADSL1/2/2+ including Annex M
•
Support for 4 ATM service classes
•
Support for IP QoS (mapping of Diffserv CP to PVC)
•
Support for Port based QoS
For tagged customer ports •
Support for VLAN ID to PVC mapping
•
Support for p-bit to PVC mapping
The Bitstream PRO offering contains the following services settings.
0.5/0.5 2/1 8/1 2/2 Standard 2/2 MIX 2/2 VoIP 10/2 Standard 10/2 MIX 10/2 VoIP 24/3 Standard 24/3 MIX 24/3 VoIP
Maximum ATM speed (Down/Up) kbps
QoS
ADSL operation mode
608/608 2432/1216 8128/1216 4864/2432 4864/2432 4864/2432 12000/2432 12000/2432 12000/2432 28480/3008 28480/3008 28480/3008
BE+ BE+ BE+ BE+ BE+, BC+, RT BE+, RT BE+ BE+, BC+, RT BE+, RT BE+ BE+, BC+, RT BE+, RT
ADSL1 Annex A ADSL1 Annex A ADSL1 Annex A ADSL2/2+ Annex M ADSL2/2+ Annex M ADSL2/2+ Annex M ADSL2/2+ Annex M ADSL2/2+ Annex M ADSL2/2+ Annex M ADSL2/2+ Annex M ADSL2/2+ Annex M ADSL2/2+ Annex M
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6.1
ADSL layer 1 requirements
6.1.1
Performance requirements
CPE 3048
CPE 3049
Performance requirement for ADSL1 capable ATU-R (interleaved mode) The ATU-R shall conform to the transmission performance requirements given by the table below under the test conditions given by Broadband Forum TR-067 clause A.2.3.2 [14] with the modifications given below. The DSLAM shall be set in ADSL1 auto-mode. •
No code violations (CV) shall be detected during SHOWTIME for any of the test cases.
•
The test shall be made with ETSI Loop #2
•
Only interleaved mode
Dist (m)
Downstream Annex A (kbit/s)
Upstream Annex A (kbit/s)
3500
4800
600
6000
600
160
Performance requirement for ADSL2+ capable ATU-R with Annex M (interleaved mode with INP=2) The ATU-R shall be capable of providing at least the bit rate specified in the table below under the test conditions given by Broadband Forum TR-100 clause A.2.5.4 table A.223[16] with the modifications given below. The DSLAM shall be set in auto-mode. •
ADSL2+ under test in Broadband Forum TR-100 clause A.2.5.4 [16] is replaced with ADSL2+ Annex M.
•
No code violations (CV) shall be detected during SHOWTIME for any of the test cases.
•
The test shall be made with ETSI loop #2
•
Only interleaved mode
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6.2 CPE 3050
Dist (m)
Downstream Annex M (kbit/s)
Upstream Annex M (kbit/s)
1300
12000
2400
2700
4800
1700
ATM layer 2 requirements CBR The ATU-R shall support ATM traffic class CBR.
CPE 3051
Queue size CBR The CPE shall support a minimum queue size of 5 kB ATM cells for CBR PVC’s.
CPE 3052
Queue size UBR The CPE shall support a minimum queue size of 64 kB ATM cells for UBR PVC’s.
CPE 3053
Two prioritisation queues The ATU-R shall support traffic prioritisation with at least two separate queues in upstream direction.
CPE 3054
CPE 3055
CPE 3056
Frame Discard The ATU-R shall support frame discard. ATM scheduling The ATM scheduling on the uplink shall at least be able to take place with strict priority. ATM shaping per PVC ATM shaping shall be supported per PVC.
CPE 3057
Shaping of CBR traffic It shall be possible to shape CBR traffic to a specific peak rate.
CPE 3058
Overbooking The uplink shall support capacity being overbooked. This includes the case that CBR traffic is part of the uplink.
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6.3
CPE 3059
CPE 3060
CPE 3061
Requirements at the Ethernet ports of the DSL modems Port type The Ethernet port on the CPE shall be possible to individually configure as untagged or tagged. IP Precedence / DSCP The CPE shall support mapping of both tagged and untagged Ethernet frames to ATM PVC based on the IP precedence and/or DSCP values in the IP header. The mapping between IP precedence, DSCP and PVC shall be configurable. The CPE shall support mapping of several IP precedence values onto a single PVC. Transparent forwarding of Ethernet frames on tagged interfaces The CPE shall be capable to transparently forward Ethernet frames on tagged interfaces.
CPE 3062
Transparent forwarding of IP precedence, DSCP The CPE shall be capable of transparently forwarding of IP precedence, DSCP values.
CPE 3063
Support for Ethernet scheduling The CPE shall support up to 4 Ethernet queues, with Weigthed Fair Queuing (WFQ).
CPE 3064
Packet size on VLAN untagged interfaces Ethernet frames up to 1518 bytes shall be possible to forward over the WAN-interface.
CPE 3065
Packet size on VLAN tagged interfaces Ethernet frames up to 1522 bytes shall be possible to forward over the WAN-interface.
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6.4 CPE 3066
CPE 3067
Performance requirements Packet losses for real time (CBR) No packet losses shall occur for Real Time traffic as long as the traffic is below its configured rate, even if the sum of Business Class and Real Time exceeds the line rate. This is valid up to a sustained UBR rate equal to the DSL line rate and for 100Mbit/s peak rates up to 64 Kbytes in total size for all LAN interfaces together. Delay for real time (CBR) The maximum and average delay, discounting the serialization delay, for real time traffic shall always be lower than business class traffic as long as the class is not overloaded.
6.5
General DSL modem requirements
6.6
Settings
CPE 3068
CPE 3069
Default settings for Standard QoS The ATU-R shall have the following default settings Class
IP Precedence
VPI
VCI
Peak Rate
ATM
BE+
0,1,2,3,4,5,6,7
8
35
Linerate
UBR
Default settings for MIX QoS The ATU-R shall have the following default settings Class
IP Precedence
VPI
VCI
Scheduler
Peak Rate
ATM
RT
4,5
8
36
ATM
1640
CBR
BC+
2,3
8
35
ATM and Ethernet WFQ (80 %)
Linerate
UBR
BE+
0,1,6,7
8
35
ATM and Ethernet WFQ (20 %)
Linerate
UBR
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CPE 3070
6.7
Default settings for VoIP QoS The ATU-R shall have the following settings Class
IP Precedence
VPI
VCI
Scheduler
Peak Rate
ATM
RT
4,5
8
36
ATM
1640
CBR
BE+
0,1,2,3,6,7
8
35
ATM
Linerate
UBR
Electrical safety All requirements in this area are provided here for information only. In the ordinances and standards referred to there are essential requirements, which are mandatory from a legal perspective.
6.7.1 CPE 3071
Ordinances concerning electrical equipment Ordinances, electrical safety For compliance with the ”Low Voltage Directive, 73/23/EEC” the following ordinances apply. The directive is mandatory for almost all electrical equipment for use at voltage ranges 501000 V AC or 75-1500 V DC. For equipment used in Sweden the voltage ranges are 0-1000 V AC and 0-1500 V DC. 1) Ordinance concerning Electrical Equipment; (SFS 1993:1068), in the Swedish Code of Statutes. 2) The National Electrical Safety Board’s Regulations concerning Certain Electrical Equipment; (ELSÄK-FS 2000:1).
CPE 3072
Equipment, which falls within the voltage ranges above, shall comply with the requirements stated in the ordinances and shall be accompanied by suppliers' declaration. NOTE. In the Ordinances there are essential requirements, which are legal and therefore mandatory.
6.7.2 CPE 3073
Standards Electrical safety, SS-EN 60 950 For mains and battery powered IT equipment connected to a telecommunications network the requirements stated in SS-EN 60 950 apply. The standard, in accordance with the ”principles of safety”
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N 14959-04 given in its introduction, covers safety requirements and compliance criteria such as: 1. Protection of equipment users from hazards in the equipment. 2. Protection of service personnel working with the telecommunication network and other users of the telecommunication network, from hazardous conditions on the telecommunication network resulting from the connection of the equipment. 3. Protection of equipment users from voltages in the telecommunication network. NOTE. In the standards there are essential requirements, which are legal and therefore mandatory.
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Abbreviations/Acronyms
ADSL ATM ATU-C ATU-R CBR DTE ITU OAM POTS TE PVC UBR VBR-nrt VBR-rt VCI VPI
Asymmetric Digital Subscriber Line Asynchronous Transfer Mode Access Terminal Unit - Central Access Terminal Unit - Remote Constant (or continuous) Bit Rate Data Terminal Equipment International Telecommunication Union Operation, Administration and Maintenance Plain Old Telephone Service Terminal Equipment Permanent Virtual Circuit Unspecified Bit Rate Variable Bit Rate – non real time Variable Bit Rate – real time Virtual Channel Identifier Virtual Path Identifier
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References
[1]
ITU-T Recommendation G.992.1 (1999-06); Asymmetric digital subscriber line (ADSL) transceivers
[2]
ITU-T Recommendation G.992.3 (2002-07); Asymmetric Digital Subscriber Line Transceivers 2 (ADSL2)
[3]
ITU-T Recommendation G.992.3 Amendment 2 (2004-04); Asymmetric digital subscriber line transceivers 2 (ADSL2) Amendment 2: Amendments to Annex J and new Annexes L and M
[4]
ITU-T Recommendation G.992.5 (2003-05); Asymmetric Digital Subscriber Line (ADSL) transceivers - Extended bandwidth ADSL2 (ADSL2+)
[5]
ITU-T Recommendation G.992.5 Amendment 1 (2004-04); Amendment 1 (new Annexes J and M) to Recommendation G.992.5
[6]
ITU-T Recommendation G.994.1 (2003-05); Handshake procedures for digital subscriber line (DSL) transceivers
[7]
ITU-T Recommendation G.996.1 (2001-02); Test procedures for Digital Subscriber Line (DSL) Transceivers
[8]
ITU-T Recommendation G.997.1 (2003-05); Physical layer management for Digital Subscriber Line (DSL) transceivers
[9]
ITU-T Recommendation I.610 (1999-02); B-ISDN Operation and Maintenance Principles and Functions
[10] ETSI TS 101 388 V1.3.1 (2002-05); Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Asymmetric Digital Subscriber Line (ADSL) European specific requirements [11] ETSI ES 202 913 V1.2.1 (2004-07); Access and Terminals (AT); POTS requirements applicable to ADSL modems when connected to an analogue presented PSTN line [12] ANSI T1.413 Issue 2 (1997-10); Network and Customer Installation Interfaces-Asymmetric Digital Subscriber Line (ADSL) Metallic Interface. [13] TeliaSonera T2682-10 ADSL and VDSL POTS splitters requirements for TE side, rev 1.0, 2010-02-08 [14] Broadband Forum TR-067 (2004-04); ADSL Interoperability Test Plan [15] Broadband Forum TR-100 (2007-03); ADSL2/ADSL2plus Performance Test Plan [16] IEEE 802.3 (2002) IEEE Standard for Information technology—Telecommunications and
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N 14959-04 information exchange between systems—Local and metropolitan area networks—Specific requirements Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications [17] IETF RFC 2684 (1999); Multiprotocol Encapsulation over ATM Adaptation Layer 5
