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T3rAbYt3
Beginner

FDPS (Frequency Dependent Pilot Sequence) differentiates ITU standard G.993.5 733 Modulation of Pilot Sequence


New modem command for FDPS to allow custom configurations of DSL modem settings to ensure DSL interoperability in different environments. Please consult your Service Provider on required modem settings (if any) for the particular SP's network.

1. How to check if FDPS is Supported by the VDSL Controller?

router# sh controller VDSL 0 console ?
<1-22197> Available console buffer size

router# sh controller VDSL 0 console 22197
Custom UK Annex M Mask NOT SET
Disable V43 CLEAR
Enable FDPS NOT SET
UKFeatureBit CLEAR
Enable GinpDsSupport
Enable GinpUsSupport
Enable MonitorTone
Enable FireDsSupport
Enable FireUsSupport
Bit CLEAR
Bit CLEAR
HBI Bit CLEAR
Chan Policy Bit CLEAR
dsattn CLEAR
dsattn CLEAR
CO5 Flag CLEAR

Note: Be sure that you use the latest IOS Software and Very High Bitrate DSL (VDSL) Firmware to Enable FDPS.

2. FDPS Enable or Disable

Before you enable the modem settings, you must execute the "service internal" command in CONFIG mode. For example:

router
# conf t
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# service internal
router(config)# end

Default is FDPS disabled.

ENABLE FDPS

router# conf t
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# controller VDSL 0
router(config-controller)# modem enableFDPS
router(config-controller)# end

Note: Reload the router after setting or unsetting this command.

DISABLE FDPS

router# conf t
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# controller VDSL 0
router(config-controller)# no modem enableFDPS
router(config-controller)# end

Note: Reload the router after setting or unsetting this command.

3. FDPS Verification

FDPS enable
router# sh controller VDSL 0 console ?
<1-22197> Available console buffer size

router# show controllers VDSL 0 console 22197 | inc Enable FDPS SET
Enable FDPS SET

router#test vdsl 0 modem exec xdslctl info --cfg
vdslCfgFlagsMask: 03210404
vdslCfgFlagsValue: 03210004

FDPS disable
router# sh controller VDSL 0 console ?
<1-22197> Available console buffer size

router# 
show controllers VDSL 0 console 22197 | inc Enable FDPS NOT SET
Enable FDPS NOT SET

router#test vdsl 0 modem exec xdslctl info --cfg
vdslCfgFlagsMask: 01210404
vdslCfgFlagsValue: 01210004

4. Additional Information ITU-T G.993.5

G.993.5 : Self-FEXT cancellation (vectoring) for use with VDSL2 transceivers
https://www.itu.int/rec/T-REC-G.993.5-202003-I!Cor1/en 

Download PDF "Recommendation G.993.5 (2019) Corrigendum 1 (03/20) (English)"
https://www.itu.int/rec/dologin.asp?lang=e&id=T-REC-G.993.5-202003-I!Cor1!PDF-E&type=items 

 

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