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[ZMEU.NET]

After a random time between some hours and maximum 2 days after confirming the wifi connection to my dir 655, the lexmark wifi printer closes connection to my router , trouble code signal too weak -255db quality unacceptable.
 I tried almost all possible settings to keep the wifi connection always on between the printer  and the router.Restarting the router  does notihng. To restore the connection i must reconfirm in the printer setup that i am using a wifi connection and not as cable one.
 I also have an old netgear router WGR614v7 and the connection  with the printer remains active for weeks . Also the Lexmark service confirmed that the problem is not caused by the printer. I don't have any other problems  keeping the wifi connection between the router and other devices.

[FurryNutz]

Link>Welcome!
What Hardware version is your router? Look at sticker under router.
Link>What Firmware version is currently loaded? Found on routers web page under status.
What region are you located?
Has a Factory Reset been performed?
How far away is the printer from the router?

Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router.
Turn off ALL QoS or Disable Traffic Shaping (DIR only) GameFuel (DGL only and if ON.) options. Advanced/QoS or Gamefuel.
Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual.
Turn on DNS Relay under Setup/Networking.
Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting.
Ensure devices are set to auto obtain an IP address.
If IPv6 is an option on the router, select Local Connection Only or Disable IPv6 options under Setup/IPv6.
Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall.
Enable uPnP and Multi-cast Streaming under Advanced/Networking. Disable uPnP for testing Port Forwarding rules.
WAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Advanced/Advanced Networking/WAN Port Speed
Set current Time Zone, Date and Time. Use an NTP server feature. Tools/Time.
 
Link>Wireless Installation Considerations
What wireless modes are you using? Under Setup/Wireless/Manual.
Try single mode G or N or mixed G and N?
Channel Width set for Auto 20/40Mhz or try 20Mhz only.
Try setting a manual channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear.
What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only. Some WiFi adapters don't support AES, so you might want to try TPIK only or Auto.
What wireless devices do you have connected?
Any cordless house phones?
Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?
Turn off WISH, and WPS under Advanced.
Try turning off Short GI, WLAN Partition,and Extra Wireless Protection if you have it. Under Advanced/Advanced Wireless.
Enable WMM Enable Under Advanced/Advanced Wireless.

[ZMEU.NET]

ok Product Page: DIR-655   Hardware Version: B1     Firmware Version: 2.06
Europe Romania
no factory reset, why that?
2 metres same room   
Any cordless house phones? yes
Any other WiFi routers in the area? yes 5
Turn off WISH, wish is off
 and WPS under Advanced. WI-FI PROTECTED SETUP is off
QOS is OFF
WAN TRAFFIC SHAPING IS OFF
STATIC IP RESERVED ON ROUTER , TRIED also on printer and without on printer, same behavior.
 IPv6 is lan only
already done  Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall.
WAN Port Speed set to Auto 

2/18/2013 12:47:45 PM
Time Zone :    
Enable Daylight Saving :      
Daylight Saving Offset :      
Daylight Saving Dates :   
    Month   Week   Day of Week   Time
DST Start            
DST End            
AUTOMATIC TIME CONFIGURATION
Enable NTP Server :      enabled
NTP Server Used :        <<   ntp1.dlink.com

tried both Channel Width set for Auto 20/40Mhz or try 20Mhz only.

using mixed G and N. G ONLY??what? thats why i bought an N router

tried many channels mostly 6 and 11, same result..

wpa/wpa2 aes  2 months but also tried old wep 10 months , same result.

wlan partition off

wmm enabled.

WHAT'S NEXT?

[ZMEU.NET]

i disabled now the short gi, what's this for?
also now i am trying G only

[FurryNutz]

ok Product Page: DIR-655   Hardware Version: B1     Firmware Version: 2.06
Europe Romania
no factory reset, why that?Should be done to clear any mis-configuration out and set up the router from scratch. Might help.
2 metres same room   
Any cordless house phones? yes Any of them near the 2.4Ghz range?
Any other WiFi routers in the area? yes 5 You maybe seeing some external WiFi congestion here with having 5 other routers near by using up the channel. Try lowing the power out put of the radio from High to Medium or Low and test. Found under Adv/Adv. Wireless.
Turn off WISH, wish is off
 and WPS under Advanced. WI-FI PROTECTED SETUP is off
QOS is OFF
WAN TRAFFIC SHAPING IS OFF
STATIC IP RESERVED ON ROUTER , TRIED also on printer and without on printer, same behavior.
 IPv6 is lan only
already done  Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall.
WAN Port Speed set to Auto  

2/18/2013 12:47:45 PM
Time Zone :     
Enable Daylight Saving :     
Daylight Saving Offset :     
Daylight Saving Dates :   
    Month   Week   Day of Week   Time
DST Start            
DST End            
AUTOMATIC TIME CONFIGURATION
Enable NTP Server :      enabled
NTP Server Used :        <<   ntp1.dlink.com

tried both Channel Width set for Auto 20/40Mhz or try 20Mhz only.

using mixed G and N. G ONLY??what? thats why i bought an N routerThis is only a test to see if that same thing happens on G mode as well.

tried many channels mostly 6 and 11, same result..

wpa/wpa2 aes  2 months but also tried old wep 10 months , same result.

wlan partition off

wmm enabled.

WHAT'S NEXT?

Short GI
Using a short (400ns) guard interval can increase throughput. However, it can also increase error rate in some installations, due to increased sensitivity to radio-frequency reflections. Select the option that works best for your installation.

[ZMEU.NET]

i disabled now the short gi, what's this for?
also now i am trying G only

this didn't help, after  12 hours i couldn't connect anymore to the lexmark printer

[FurryNutz]

Is the printer the only other wifi device connected to the 655? I presume other devices don't exhibit this behavior?

[ZMEU.NET]

Yes only with the lexmark printer... very tricky problem, no problem with other wifi devices, but the printer is always connected if i choose the netgear router.  Hope there is  a dlink setting to keep the wifi connection alive with the lexmark printer.

[FurryNutz]

One test you could try, Set up Wifi Security to WPA and TPIK only and test, then run a test with no security on the printer and test.

I would check with the Mfr of the printer to see if there is any FW updates.

Does the print have a USB or LAN wired connector by chance?

If other devices are connecting and remain connected to the 655 with out loosing the connection and the printer does, would point to the printer having a problem maintaining the connection, not the router.

[ZMEU.NET]

The Lexmark service did not detect  the problem, i thought they lied but
there are no problems   with my old netgear router, only with the d-link one.
I have always the latest Firmware on the printer , none new since 2011
The problem may be the incompatibility between the d-link router and the printer, maybe it can be solved by tweaking one of the thousands of  d-link settings. I feel so unlucky , nobody else encountered my problem
 Why are you pointing to the USB port of the printer? You want me to connect it via USB to the d-link router?lol

The Lexmark printer network setup page say signal unacceptable, but it says it is still connected to my d-link router.. maybe the d-link router shuts down the WiFi connection with the printer  but don't understand why.  The Lexmark printer is also weird when it shows red x  on the active d-link connection, it also can't find any other of 10 WiFi networks.. If i reconfirm in Lexmark  printer touch panel connection settings  that i  want to connect via WiFi  ( vs Ethernet) then it reestablishes in seconds the wifi connection to the d-link router and  then i can also find the 10 other WiFi networks.

[FurryNutz]

10 other WiFi networks huh? This could also be a source of your problems. Having 10 other near by WiFi networks could be causing WiFi congestion as they are all trying to use up available channels, 1 thru 11 and some are probably using the same channel which is not preferred.

You may want to switch from 2.4Ghz to 5Ghz in your area.

[ZMEU.NET]

Are you joking? after exploring all the settings you recommend me to buy another router? wtf?!  WiFi congestion? I live in a town with flats/apartments not in the fields
Yes of course i have a cordless phone, i also have mobile phones, i don't live in the 19th Century.
 Those 10 wifi networks have weak signal , no strong signal to cause any interference.
How come a cheap old NETGEAR G router can face all these modern problems and keep alive for weeks.
 Also the N protocol is far better than G but it seems on NETGEAR it doesn't help.

[Hard Harry]

Well first I would try to hook up the old netgear back up. Even if the problem didn't occur with the Netgear "then" it may "now". Really sounds like the wireless antenna on the printer is kicking out so we have to rule that our first. If the problem re-occurs after 12hr with the Dlink, then I would say run the Netgear for 24 and see if it happens.

If not, could be a issue with the security and the printer waking from Idle. Check out this thread. Seems similar. Its amazing what Google can find. :-)

"Final update, the printer works and logged in fine this morning. The SSID security settings that work are:
WEP  and also  WPA-PSK [TKIP]"

But to be clear, since this is isolated to one device, its more a printer issue then a router issue. May want to try the Printer's forums if that solution doesn't work.

[FurryNutz]

Are you joking? after exploring all the settings you recommend me to buy another router? wtf?!  WiFi congestion? I live in a town with flats/apartments not in the fields Exactly, if you live in a area with alot of other Wifi routers near by, they are also using up the channels, even at low signal strength, the channel is being used up. You can't occupy the same channel with out interferences.

Yes of course i have a cordless phone, i also have mobile phones, i don't live in the 19th Century. Any of these phone running ont the 2.4Ghz frequency? I wasn't trying to tell you that you needed to live in the 19th century. Trying to get more details on your surroundings.
 Those 10 wifi networks have weak signal , no strong signal to cause any interference. Even at low signal strength, the channel is being used up. You can't occupy the same channel with out interferences.

How come a cheap old NETGEAR G router can face all these modern problems and keep alive for weeks.
 Also the N protocol is far better than G but it seems on NETGEAR it doesn't help. If this is an old generation router, then it problaby does not have the "Good Nieghbor Policy" coding included that dictates how routers work around others as newer generation routers do now days. Your 655 has this coding as other newer and recent generation routers now have and has to be adheard to by ALL Mfrs.

One thing you could do, if the printer seems to be having the problem with the 655 Wifi, connect up the older NG router and set it up as a wired AP and have the pritner connect to it.

[ZMEU.NET]

Using 2 wifi routers means double the power consumption even it is low and also double the radiations..