For the past several months, things have been super. About 4 weeks ago an odd problem started cropping up.

The cable modem lights would be all green. I'd even have the yellow activity light blinking. However, I would no longer be able to get to the internet. Not from any of my computers. My vonage phone would also go down. However, if I power cycled the modem, it would usually fix itself. Often if I just waited for a few minutes, it would recover on its own.

On my own, I went ahead and did all the standard diagnostic stuff... replacing wiring, bypassing my firewall and jacking a computer directly into the cable modem.

None of that worked. It came down to either a failing modem, a bad cable connection, or faulting gear on Cox's side. I figured it was most likely the modem, especially as Cox had ripped up and replaced the majority of the gear from the pedestal out to the street for me about a year ago.

So, I had the modem replaced. The problem has not gone away. In the past 2 weeks, I have had had 5 Cox technicians (including one "tech supervisor") out. None of them could figure it out. All of them wanted to blame my gear, the cable lines in my apartment, etc etc. Anything but their own gear.

However, I've already ruled out my gear. And they've certified that my connection strength is excellent.

Their technicians are badly undertrained, and I'm hoping someone here may have some idea what these cable modem logs mean.

If it helps, I have a Motorolla SB5101 and live in Phoenix. I am a Cox Cable subscriber.

SIGNAL INFO
Code:
Signal

The Signal Page provides information about the connection between the Cable Modem and the cable company.
  


Status
Signal
Addresses
Configuration
Logs
Help

		Downstream	Value 
Frequency	579000000 Hz

Signal To Noise Ratio	38.2 dB

Power Level	1.0 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading


Upstream	Value
Channel ID	1
Frequency	19600000 Hz
Power	39.0 dBmV
CABLE MODEM LOG
Code:
2008-03-16 19:13:02	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
2008-03-16 09:51:21	5-Warning	D103.0	DHCP RENEW WARNING - Field invalid in response
2008-03-15 17:17:01	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
2008-03-15 09:51:29	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:12	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
2008-03-15 09:31:18	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:13	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-14 15:37:34	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:03:28	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:03:18	3-Critical	T002.0	SYNC Timing Synchronization failure - Failed to acquire FEC framing
1970-01-01 00:03:17	3-Critical	T001.0	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
1970-01-01 00:00:06	6-Notice	M571.1	Ethernet link up - ready to pass packets
1970-01-01 00:00:06	3-Critical	T001.0	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
1970-01-01 00:00:03	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-14 15:33:50	6-Notice	M573.0	Modem Is Shutting Down and Rebooting...
2008-03-14 15:33:50	3-Critical	R004.0	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2008-03-14 15:33:49	3-Critical	T002.0	SYNC Timing Synchronization failure - Failed to acquire FEC framing
2008-03-14 15:30:21	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:14	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-14 15:25:08	6-Notice	M573.0	Modem Is Shutting Down and Rebooting...
2008-03-14 15:25:08	3-Critical	R004.0	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2008-03-14 15:25:08	3-Critical	T002.0	SYNC Timing Synchronization failure - Failed to acquire FEC framing
2008-03-14 10:32:41	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:15	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:09	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-14 10:06:31	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:12	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:06	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-14 09:03:39	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:16	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:08	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:04	6-Notice	M571.1	Ethernet link up - ready to pass packets
1970-01-01 00:00:03	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-14 09:03:00	6-Notice	M573.0	Modem Is Shutting Down and Rebooting...
2008-03-14 09:03:00	3-Critical	R004.0	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2008-03-14 09:02:28	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
2008-03-13 21:20:53	5-Warning	D103.0	DHCP RENEW WARNING - Field invalid in response
2008-03-13 13:29:58	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
2008-03-13 09:20:53	5-Warning	D103.0	DHCP RENEW WARNING - Field invalid in response
2008-03-13 08:54:43	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
2008-03-12 21:21:01	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:12	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:07	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-12 09:05:54	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:14	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:08	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-11 08:54:00	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:13	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:03	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-08 09:47:51	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:12	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:05	6-Notice	M571.1	Ethernet link up - ready to pass packets
1970-01-01 00:00:02	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-08 09:47:23	6-Notice	M573.0	Modem Is Shutting Down and Rebooting...
2008-03-08 09:47:23	3-Critical	R004.0	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2008-03-08 09:46:50	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
2008-03-08 09:35:15	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:13	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:09	6-Notice	M571.1	Ethernet link up - ready to pass packets
1970-01-01 00:00:07	3-Critical	R005.0	Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:07	6-Notice	M571.4	Ethernet link dormant - not currently active
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-06 15:08:05	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:14	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:03	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-06 14:37:52	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:15	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:02	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-06 14:35:27	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:12	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:09	6-Notice	M571.1	Ethernet link up - ready to pass packets
1970-01-01 00:00:07	6-Notice	M571.4	Ethernet link dormant - not currently active
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-06 14:34:24	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:13	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:02	6-Notice	M571.1	Ethernet link up - ready to pass packets
2008-03-06 14:27:36	6-Notice	M573.0	Modem Is Shutting Down and Rebooting...
2008-03-06 14:27:36	3-Critical	R004.0	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
2008-03-06 14:27:36	3-Critical	T002.0	SYNC Timing Synchronization failure - Failed to acquire FEC framing
2008-03-06 14:16:08	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:14	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:02	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-06 14:14:01	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:12	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:02	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-05 16:27:54	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:16	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:03	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-05 16:20:31	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:00:14	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:02	6-Notice	M571.4	Ethernet link dormant - not currently active
2008-03-05 16:17:22	6-Notice	I401.0	TLV-11 - unrecognized OID
1970-01-01 00:01:56	3-Critical	D003.0	DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:01:45	3-Critical	T001.0	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing