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PreviousCS-03, Part VIII, - Requirements and Tests Methods for Digital Subscriber Line (xDSL) Terminal Equipment
Annex A - Deployment Guidelines
To ensure spectral compatibility with other xDSL technologies deployed in the loop plant (i.e. to avoid third party harm), ADSL, ADSL2, ADSL2+, HDSL, HDSL2, SDSL, SHDSL, HDSL4, VDSL and VDSL2 systems should not be deployed on loops longer than the Equivalent Working Length (EWL) identified below:
| xDSL | Maximum EWL |
|---|---|
| ADSL | All non-loaded loops |
| ADSL2, ADSL2+ | See Table 1(b) |
| HDSL | 2750 m (9000 ft) |
| HDSL2 | 3200 m (10,500 ft) |
| 2B1Q SDSL | See Table 1(c) |
| SHDSL | See Table 1(d) |
| HDSL4 | All non-loaded loops |
| VDSL | All non-loaded loops |
| VDSL2 | All non-loaded loops |
Equivalent Working Length (EWL) is defined as:
EWL = L26 + 0.75 (L24) + 0.60 (L22) + 0.40 (L19)
Where L26 is the length of 26 AWG cable, L24 is the length of 24 AWG cable, L22 is the length of 22 AWG cable, and L19 is the length of 19 AWG or larger gauge cable in the assigned loop.
xDSL transceivers using asymmetric spectra (ADSL, HDSL2, HDSL4) shall not be installed with a transceiver (TU-C) transmitting in the downstream frequency band (ADSL: 138-1,104 kHz, HSDL2: 0- 440 kHz, HDSL4: 0-600 kHz) located at the customer end of the loop (customer premises).
The administrative procedures to be used by Local Exchange Carriers or other service providers to ensure that systems are installed on loops meeting these deployment guidelines are beyond the scope of this document.
| Mask Number | Upstream Mask Designator | ADSL Deployment Guideline, EWL (m) |
|---|---|---|
| 1 | ADLU-32 | > 4725 (15.5 kft) |
| 2 | ADLU-36 | 3353 (11.0 kft) |
| 3 | ADLU-40 | 3201 (10.5 kft) |
| 4 | ADLU-44 | 3048 (10.0 kft) |
| 5 | ADLU-48 | 2896 (9.5 kft) |
| 6 | ADLU-52 | 2896 (9.5 kft) |
| 7 | ADLU-56 | 2744 (9.0 kft) |
| 8 | ADLU-60 | 2744 (9.0 kft) |
| 9 | ADLU-64 | 2744 (9.0 kft) |
| PSD | Maximum 2B1Q SDSL Line Bit Rate (kbps) | 2B1Q SDSL Deployment Guideline, EWL (m) |
|---|---|---|
| SM1 PSD Mask | 300 | all non-loaded loops |
| SDSLu (f) with fsym = 160000 | 320 | 4725 (15.5 kft) |
| SDSLu (f) with fsym = 168000 | 336 | 4420 (14.5 kft) |
| SDSLu (f) with fsym = 192000 | 384 | 4115 (13.5 kft) |
| SDSLu (f) with fsym = 200000 | 400 | 4115 (13.5 kft) |
| SDSLu (f) with fsym = 208000 | 416 | 3965 (13 kft) |
| SDSLu (f) with fsym = 232000 | 464 | 3810 (12.5 kft) |
| SDSLu (f) with fsym = 264000 | 528 | 3660 (12 kft) |
| SDSLu (f) with fsym = 296000 | 592 | 3505 (11.5 kft) |
| SDSLu (f) with fsym = 328000 | 656 | 3355 (11 kft) |
| SDSLu (f) with fsym = 360000 | 720 | 3200 (10.5 kft) |
| SDSLu (f) with fsym = 392000 | 784 | 3050 (10 kft) |
| SDSLu (f) with fsym = 456000 | 912 | 2895 (9.5 kft) |
| SDSLu (f) with fsym = 488000 | 976 | 2745 (9 kft) |
| SDSLu (f) with fsym = 552000 | 1104 | 2590 (8.5 kft) |
| SDSLu (f) with fsym = 616000 | 1232 | 2440 (8 kft) |
| SDSLu (f) with fsym = 712000 | 1424 | 2285 (7.5 kft) |
| SDSLu (f) with fsym = 840000 | 1680 | 2135 (7 kft) |
| SDSLu (f) with fsym = 936000 | 1872 | 1980 (6.5 kft) |
| SDSLu (f) with fsym = 1064000 | 2128 | 1830 (6 kft) |
| SDSLu (f) with fsym = 1128000 | 2256 | 1675 (5.5 kft) |
| SDSLu (f) with fsym = 1160000 | 2320 | 1525 (5 kft) |
| SHDSL Line Bit Rate (kbps) | SHDSL Deployment Guideline EWL (m) |
|---|---|
| LBR < 592 | all non-loaded loops |
| 600 < LBR < 616 | 4770 (15.0 kft) |
| 624 < LBR < 628 | 4420 (14.5 kft) |
| 656 < LBR < 688 | 4265 (14.0 kft) |
| 696 < LBR < 800 | 4115 (13.5 kft) |
| 808 < LBR < 832 | 3810 (12.5 kft) |
| 840 < LBR < 896 | 3660 (12.0 kft) |
| 904 < LBR < 952 | 3965 (13.0 kft) |
| 960 < LBR < 1000 | 3810 (12.5 kft) |
| 1008 < LBR < 1088 | 3660 (12.0 kft) |
| 1096 < LBR < 1160 | 3505 (11.5 kft) |
| 1168 < LBR < 1320 | 3355 (11.0 kft) |
| 1328 < LBR < 1472 | 3200 (10.5 kft) |
| 1480 < LBR < 1536 | 3050 (10.0 kft) |
| 1544 < LBR < 1552 | 3200 (10.5 kft) |
| 1560 < LBR < 1664 | 3050 (10.0 kft) |
| 1672 < LBR < 1880 | 2895 (9.5 kft) |
| 1888 < LBR < 2008 | 2745 (9.0 kft) |
| 2016 < LBR < 2320 | 2590 (8.5 kft) |
Annex B - Informative References
[1] T1.417 - 2001: Spectrum Management for Loop Transmission Systems
[2] ITU-T Recommendation K.50, G.992.3, G.992.5, G.993.2
[3] T1 TRQ - XX: Technical Requirements for Maximum Voltage, Current and Power Levels for Network-Powered Transport Systems
[4] CAN/CSA-C22.2 NO. 60950-00: Safety of Information Technology Equipment
[5] T1.424/Trial-Use - Interface Between Networks and Customer Installations—Very-high Speed Digital Subscriber Lines (VDSL) Metallic Interface
[6] T1E1.4/2002-002 - Draft proposed American National Standard, Spectrum Management for Loop Transmission Systems, Issue 2
