Kitz Forum

Broadband Related => ADSL Issues => Topic started by: konrado5 on July 19, 2018, 04:08:42 PM

Title: two-time synchronization
Post by: konrado5 on July 19, 2018, 04:08:42 PM

I've noticed my synchronization establishment process is two-time.

Code: [Select]

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: G.994 Training
Last Retrain Reason:    8000
Last initialization procedure status:   0

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: G.992 Started
Last Retrain Reason:    8000
Last initialization procedure status:   0

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: G.922 Channel Analysis
Last Retrain Reason:    8000
Last initialization procedure status:   0

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: G.992 Message Exchange
Last Retrain Reason:    8000
Last initialization procedure status:   0

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: G.994 Training
Last Retrain Reason:    8000
Last initialization procedure status:   3

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: G.992 Started
Last Retrain Reason:    8000
Last initialization procedure status:   3

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: G.922 Channel Analysis
Last Retrain Reason:    8000
Last initialization procedure status:   3

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    8000
Last initialization procedure status:   0
Max:    Upstream rate = 1213 Kbps, Downstream rate = 21108 Kbps
Bearer: 0, Upstream rate = 1213 Kbps, Downstream rate = 20931 Kbps
I've also type adslctl info --linediag after first synchronization.

Code: [Select]

# adslctl info --linediag
adslctl: ADSL driver and PHY status
Status: G.994 Training
Last Retrain Reason:    8000
Last initialization procedure status:   3

                Down            Up
SNRM(dB):        3.2             6.0
LATN(dB):        23.0            15.1
SATN(dB):        25.3            14.6
TxPwr(dBm):      19.1            12.0
ATTNDR(Kbps):   21272           1221After second syncrhonzation process power output is merely 18.6 dBm.

Have somebody noticed something like this? What is cause?

Title: Re: two-time synchronization
Post by: burakkucat on July 19, 2018, 04:44:02 PM

In the past, I have performed a similar experiment to that which you have shown and have also recorded evidence of two-attempt synchronisation process. It is a normal event for my circuit and I have never bothered to understand the reason why.

Perhaps a study of the relevant ITU-T G-Series Recommendations (https://www.itu.int/itu-t/recommendations/index.aspx?ser=G) may reveal the answer?

Title: Re: two-time synchronization
Post by: konrado5 on July 19, 2018, 10:51:19 PM

Retrain reason is 8000 (G992 failure).
http://forum.kitz.co.uk/index.php/topic,12504.0.html