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Regular Contributor
Posts: 53
Registered: ‎05-15-2009
Accepted Solution

Arris TM502G LINK light continually flashes

I have the subject modem, and it apparently is working fine.

 

I have it connected to a Linksys WRT54G router. It has always been connected to this router from day one of Comcast service.  Nothing has changed in my hardware configuration.

 

Up until yesterday the LINK light would only flash with internet traffic. Now it flashes all the time, even when the computer is turned off.

 

Everything still works, speed is acceptable, but I'm thinking something is going bad with the modem to cause it to flash like it does. As I mentioned, for months the LINK light exhibited what I term "normal" behavior. Now with it blinking all the time, this seems to be "abnormal" based on past experience.

 

What could/would cause the Link light to flash, even with the PC turned off?  Strange...

 

Connection Expert
Joe
Posts: 7,122
Registered: ‎06-30-2003

Re: Arris TM502G LINK light continually flashes

[ Edited ]

it is a effect of DOCSIS 3.0 upgrade some modem do that.

 post your logs from the modem

 post signals from modem click this link

Message Edited by Joe on 08-11-2009 07:00 PM
Regular Contributor
Posts: 53
Registered: ‎05-15-2009

Re: Arris TM502G LINK light continually flashes

I see some DCHP errors in the Event Log on 08/07/09, that's when my LINK light started flashing continually. I do have an IP assigned. My Arris logs are first, then at the bottom is the connection info from my router.

 


      Status
Status     HW/FW Versions     Event Log     CM State
 RF Parameters
Downstream
     Freq/Power:     729.000 MHz     -5 dBmV      
     Signal to Noise Ratio:      36 dB      
     Modulation:    QAM256     
Upstream
     Freq/Power:    25.300 MHz     36 dBmV      
      Channel Type:     DOCSIS 1.x (TDMA)     
      Symbol Rate:     2560 kSym/sec     
      Modulation:     QAM16      

 Status
System Uptime:     0 days 23h:33m:15s
Computers Detected:    1
CM Status:    Telephony-AC Power Iso OFF Reg Complete
Time and Date:    TUE AUG 11 17:39:17 2009

 Interface Parameters
Interface Name     Provisioned     State     Speed     MAC address
LAN         Enabled     UP     100     xxxxxxxx
CABLE         Enabled     UP     ----     xxxxxxxx
USB         Enabled     DOWN     12     xxxxxxxx
MTA         Enabled     UP     ----     xxxxxxxx

© Copyright 2004-2007, ARRIS Group, Inc., All rights reserved.


-AND-
    

  Event Log
Status     HW/FW Versions     Event Log     CM State
 DOCSIS(CM) Events
Date Time     Event ID     Event Level     Description
8/7/2009 0:44     13000100     3     DHCP FAILED - Discover sent, no offer received
8/7/2009 0:44     20000200     3     No Ranging Response received - T3 time-out
8/7/2009 0:45     13000100     3     DHCP FAILED - Discover sent, no offer received
8/7/2009 0:45     18000200     3     UCD invalid or channel unusable
8/7/2009 0:45     17000100     3     SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
8/7/2009 0:45     20000200     3     No Ranging Response received - T3 time-out
8/7/2009 0:45     13000100     3     DHCP FAILED - Discover sent, no offer received
8/7/2009 0:45     18000200     3     UCD invalid or channel unusable
8/7/2009 0:45     17000100     3     SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
8/7/2009 0:48     20000200     3     No Ranging Response received - T3 time-out
8/7/2009 0:48     20000300     3     Ranging Request Retries exhausted
8/7/2009 0:48     18000200     3     UCD invalid or channel unusable
8/7/2009 0:48     17000100     3     SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
8/7/2009 0:48     20000200     3     No Ranging Response received - T3 time-out
8/7/2009 0:49     13000100     3     DHCP FAILED - Discover sent, no offer received
8/7/2009 0:49     20000200     3     No Ranging Response received - T3 time-out
8/7/2009 0:50     13000100     3     DHCP FAILED - Discover sent, no offer received
8/7/2009 0:50     18000200     3     UCD invalid or channel unusable
8/7/2009 0:50     17000100     3     SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
8/10/2009 17:41     20000200     3     No Ranging Response received - T3 time-out


 PACKETCABLE(MTA) Events
Date Time     Event Level     Enterprise     Event ID     Description     MAC Address     Endpoint Name
1/1/1970 0:00     5     4115     7     Voice Line Loop Current Change to High, Line Number = 1     00:15:A3:CD:CC:FE     AALN/1:/*******
1/1/1970 0:00     5     4115     7     Voice Line Loop Current Change to High, Line Number = 2     00:15:A3:CD:CC:FE     AALN/2:/*******
8/10/2009 18:06     5     4115     16     MTA TFTP: Successful     00:15:A3:CD:CC:FE     *********************************/************
8/10/2009 18:06     5     4115     26     MTA PROV: Successful!     00:15:A3:CD:CC:FE     *********************************/************
8/10/2009 18:07     5     4115     3     Voice Line State Change, Line Number = 1, Prev State = OOS, New State = IS     00:15:A3:CD:CC:FE     AALN/1:*********************************/************
8/10/2009 18:07     5     4115     3     Voice Line State Change, Line Number = 2, Prev State = OOS, New State = IS     00:15:A3:CD:CC:FE     AALN/2:*********************************/************
8/10/2009 18:07     5     4115     14     Power Supply Telemetry Log - TELEMETRY NORMAL     00:15:A3:CD:CC:FE     *********************************/************


© Copyright 2004-2007, ARRIS Group, Inc., All rights reserved.


-AND-

       Registration Status
Status     HW/FW Versions     Event Log     CM State

CM State: Telephony-AC Power Iso OFF Reg Complete
Complete    Docsis-Downstream Scanning
Complete    Docsis-Downstream Ranging
Complete    Docsis-Upstream Ranging
Complete    Docsis-DHCP
Complete    Docsis-TFTP
Complete    Docsis-Data Reg Complete
Complete    Telephony-DHCP
Complete    Telephony-TFTP
Complete    Telephony-Reg with Call Server
Complete    Telephony-Reg Complete

TOD State:
Retrieved    Time of Day

BPI State:
Enabled - Authorized    BPI Status

DHCP Attempts to obtain CM IP Address:
1    Attempt(s)

Power Supply Telemetry:
Battery Port    Battery Operational Status    Battery Part Number
1    TELEMETRY NORMAL    721944

Battery Serial Number:
Battery Port 1    Pack Serial Number: 370801H09G5

© Copyright 2004-2007, ARRIS Group, Inc., All rights reserved.



-AND-


my Linksys router info....

      
Login Type:         Automatic Configuration - DHCP            
IP Address:         98.192.164.62            
Subnet Mask:         255.255.252.0            
Default Gateway:     98.192.164.1            
DNS 1:             68.87.76.178            
DNS 2:             68.87.78.130            
DNS 3:                
MTU:             1500

 

Recognized Contributor
stonecoldbandi
Posts: 123
Registered: ‎09-09-2007

Re: Arris TM502G LINK light continually flashes

[ Edited ]
since your emta is connected to a router and the router is turned on all the time the link light on the 502 will always flash if you unplug your router the link light will stop blinking...every arris emta the link light always blinks when there is an active connection...there is nothing wrong with the emta and your levels are fine.
Message Edited by stonecoldbandi on 08-12-2009 01:30 PM
Recognized Contributor
stonecoldbandi
Posts: 123
Registered: ‎09-09-2007

Re: Arris TM502G LINK light continually flashes

[ Edited ]
double post...my bad:smileycry:
Message Edited by stonecoldbandi on 08-12-2009 01:30 PM
Regular Contributor
Posts: 53
Registered: ‎05-15-2009

Re: Arris TM502G LINK light continually flashes

Now I know.

 

Thank you!

Recognized Contributor
stonecoldbandi
Posts: 123
Registered: ‎09-09-2007

Re: Arris TM502G LINK light continually flashes

glad i could help
Security Expert
LoPhatPhuud
Posts: 2,748
Registered: ‎11-01-2005
Connection Expert
EG
Posts: 40,086
Registered: ‎12-24-2003