Frequency Dependent Pilot Sequence support

[dsoldat1975]

Hello, 

does anybody know if Cisco C1000 Series support the FDPS (Frequency Dependent Pilot Sequence, G993.5 G.vectoring)?

[pieterh]

this datasheet mentions G992.5 en G993.2 not G993.5!   so I guess not (Cisco would include this)

but this wiki mentions VDSL2 vectoring together with G993.5 / G.vector,

so as VDSL2 Vectoring is supported I'm not sure…. It may indicate pre-standard 

DSL interfaces
C1116 and C1117
● Dying gasp.
● ITU G.993.2 (VDSL2) and supported profiles: 8a, 8b, 8c, 8d, 12a, 12b, and 17a.
● VDSL2 Vectoring.
● ADSL Annex A and Annex B ITU G. 992.1 (ADSL), G.992.3 (ADSL2), and G.992.5 (ADSL2+).
● ADSL Annex M G.992.3 (ADSL2) and G.992.5 (ADSL2+).
C1112 and C1113
● G.FAST (spectrum up to 106MHz) Annex A, Annex B, Annex M and compatible with ADSL2/2+ and VDSL2.
● ITU G.993.2 (VDSL2) and supported profiles: 8a, 8b, 8c, 8d, 12a, 12b, 17a, and 35b.
● ITU G.9700/9701/997.2 G.FAST and supported profiles: 106a, and 106b.
C1118
● G.SHDSL.

[T3rAbYt3]

1. Check if Vectoring is enabled

IOS router shows the training mode as G993.2 even though the line is trained with full vectoring and this documented with the below cosmetic Bug:

Bug Link: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuw72999

Recommended way to check if Vectoring is enabled on a line is using the command below:

CPE# conf t
CPE(config)# service internal
CPE(config)#exit
CPE#test vdsl 0 modem exec adsl info --vectoring
The output of the command is :
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 11864 Kbps, Downstream rate = 44782 Kbps
Bearer: 0, Upstream rate = 10456 Kbps, Downstream rate = 41800 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Vectoring state: 1
Total error samples Ethernet pkts sent: 0
Total error samples Ethernet pkts discarded: 0
Total error samples statuses sent: 0
Total error samples statuses discarded: 0

Vectoring state: 1 >>>> Vectoring enabled

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

https://community.cisco.com/t5/routing/fdps-frequency-dependent-pilot-sequence-differentiates-itu/td-p/4169340

Tags:FDPSSRAvdslwan