JB5467
New Around Here
Hello everyone,
I hope you are well. I own an Asus DSL-N55U modem/router which I purchased in June 2013. It is running the most recent firmware 3.0.0.4.376_2736 released on the 19th of January 2015. I always install the most recent firmware versions as they become available.
About 2 weeks ago the router lost its WAN connection for about 5 minutes but the log only showed loss of connection for 30 seconds (see log below). This also happened in September 2014.
At all other times the router is very fast and stable. Could these quite rare disconnections be due to the line attenuation and signal to noise ratio of the phone line?
Here are the current values of both:
For the line attenuation values I know that a value of 35 dB (as shown above) is considered average. However I cannot tell if the signal to noise ratio (SNR) value is of concern or not. For my previous router (a non Asus router) this was called noise margin and was measured in dB. Is a value of 6.6 considered adequate?
To test if any of the connected telephones (there are 2 filtered phones on the line) were causing unnecessary noise, I disconnected both and only had the router connected to the phone line (without the splitter). The line attenuation and signal to noise ratio values were as follows:
During a phone call, there is no unwanted noise during the call.
If the signal to noise ratio (SNR) is of concern, have you any suggestions to improve it? Should I simply contact my ISP? My router is connected using a standard two plug RJ11 splitter connected to the main drop point (main phone socket of the house). I also disconnected this splitter to obtain the second set of SNR and line attenuation values shown above.
I live in Ireland and I receive a 10 Mb ADSL connection from my ISP and I consistently receive between 10 Mb and 10.2 Mb (tested with www.speedtest.net). Any input/advice that you could provide in relation to the above line attenuation and SNR values would be much appreciated. If I can supply any further information, please let me know.
Thank you very much in advance for your time. Have a good day.
Router Log: (IP and MAC addresses have been removed)
I hope you are well. I own an Asus DSL-N55U modem/router which I purchased in June 2013. It is running the most recent firmware 3.0.0.4.376_2736 released on the 19th of January 2015. I always install the most recent firmware versions as they become available.
About 2 weeks ago the router lost its WAN connection for about 5 minutes but the log only showed loss of connection for 30 seconds (see log below). This also happened in September 2014.
At all other times the router is very fast and stable. Could these quite rare disconnections be due to the line attenuation and signal to noise ratio of the phone line?
Here are the current values of both:
Code:
=====================
Modulation : ADSL2+
Annex Mode : Annex A/L
Line State : up
Lan Tx : 39136586
Lan Rx : 31453286
ADSL Tx : 12273832
ADSL Rx : 13960547
CRC Down : 0
CRC Up : 11267
FEC Down : 0
FEC Up : 5214
HEC Down : 48807
HEC Up : 0
SNR Up : 6.2
SNR Down : 6.6
Line Attenuation Up : 20.6
Line Attenuation Down : 35.0
Data Rate Up : 1020
Data Rate Down : 12288
=====================For the line attenuation values I know that a value of 35 dB (as shown above) is considered average. However I cannot tell if the signal to noise ratio (SNR) value is of concern or not. For my previous router (a non Asus router) this was called noise margin and was measured in dB. Is a value of 6.6 considered adequate?
To test if any of the connected telephones (there are 2 filtered phones on the line) were causing unnecessary noise, I disconnected both and only had the router connected to the phone line (without the splitter). The line attenuation and signal to noise ratio values were as follows:
Code:
=====================
SNR Up : 7.6
SNR Down : 6.0
Line Attenuation Up : 20.7
Line Attenuation Down : 35.0
=====================During a phone call, there is no unwanted noise during the call.
If the signal to noise ratio (SNR) is of concern, have you any suggestions to improve it? Should I simply contact my ISP? My router is connected using a standard two plug RJ11 splitter connected to the main drop point (main phone socket of the house). I also disconnected this splitter to obtain the second set of SNR and line attenuation values shown above.
I live in Ireland and I receive a 10 Mb ADSL connection from my ISP and I consistently receive between 10 Mb and 10.2 Mb (tested with www.speedtest.net). Any input/advice that you could provide in relation to the above line attenuation and SNR values would be much appreciated. If I can supply any further information, please let me know.
Thank you very much in advance for your time. Have a good day.
Router Log: (IP and MAC addresses have been removed)
Code:
=====================
Jan 16 12:22:28 pppd[982]: Serial link appears to be disconnected.
Jan 16 12:22:31 WAN Connection: Fail to connect with some issues.
Jan 16 12:22:31 stop_nat_rules: apply the redirect_rules!
Jan 16 12:22:34 pppd[982]: Connection terminated.
Jan 16 12:22:34 pppd[982]: Modem hangup
Jan 16 12:23:19 pppd[982]: Timeout waiting for PADO packets
Jan 16 12:23:54 pppd[982]: Connected to MAC address via interface eth2.1.1
Jan 16 12:23:54 pppd[982]: Connect: ppp0 <--> eth2.1.1
Jan 16 12:23:54 pppd[982]: CHAP authentication succeeded
Jan 16 12:23:54 pppd[982]: peer from calling number MAC address authorized
Jan 16 12:23:54 pppd[982]: local IP address X
Jan 16 12:23:54 pppd[982]: remote IP address X
Jan 16 12:23:54 pppd[982]: primary DNS address X
Jan 16 12:23:54 pppd[982]: secondary DNS address X
Jan 16 12:23:55 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_eth2.1.1)!
Jan 16 12:23:55 rc_service: ip-up 24405:notify_rc stop_upnp
Jan 16 12:23:55 rc_service: ip-up 24405:notify_rc start_upnp
Jan 16 12:23:55 rc_service: ip-up 24405:notify_rc stop_ntpc
Jan 16 12:23:55 rc_service: ip-up 24405:notify_rc start_ntpc
Jan 16 12:23:56 WAN Connection: WAN was restored.
Jan 16 12:24:25 rc_service: ntp 24432:notify_rc stop_ntpc
Jan 16 12:24:27 rc_service: ntp 24432:notify_rc restart_upnp
Jan 16 12:24:27 rc_service: ntp 24432:notify_rc restart_diskmon
Jan 16 12:24:27 disk monitor: be idle
