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mvnssa
Level 2: Rookie

Cable Adapter & Smart Modem Gen 2 Issue

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Smart modem gen2 installed for a few months after NBN installed in the street knocked the unit complex off for five days replacing a Netgear Telstra Gateway Max that preformed extremely well. Gen2 initially worked ok. Now drops off generally at 3am and comes back online mid morning, but also occurs at other times.

When fault occurs, the Cable adapter lights, power =  on, Down + up stream on, Internet flashing green but should be on solid green , Network solid blue, but should be flashing quickly.

Gen 2 Modem, WiFi on, online = on, wan/dsl = on, mobile mode = on, mobile signal ok.

I have noted the Gen2 lose wan information, IP address & DNS info, but not all the time. Additionally, my laptop and other devices connected to Gen2 have been disconnected, due to the ssid not been advertised.

The Gen2 has on occasions not recognize the backup sim card and does not always fail over to the sim even when the sim is recognized and functioning.

 

I am not sure if this is a Gen2 modem issue or cable adapter or external issue? The problem became more evident after NBN installed additional hardware in the complex several weeks ago.

 

Any advice greatly appreciated.

 

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Level 24: Supreme Being
Level 24: Supreme Being
Accepted Solution

Re: Cable Adapter & Smart Modem Gen 2 Issue

It sounds like an external fault. Could you post your line stats these will indicate if it is a cable fault.

The line stats are located here on the cable adapter, you might need to plug directly into the adapter with Ethernet:
http://192.168.100.1/ > Broadband Connection > Connection Settings

Default Username/password: admin/password
You're looking for Frequencies, Power Levels, SNR, etc

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7 REPLIES 7
Level 24: Supreme Being
Level 24: Supreme Being
Accepted Solution

Re: Cable Adapter & Smart Modem Gen 2 Issue

It sounds like an external fault. Could you post your line stats these will indicate if it is a cable fault.

The line stats are located here on the cable adapter, you might need to plug directly into the adapter with Ethernet:
http://192.168.100.1/ > Broadband Connection > Connection Settings

Default Username/password: admin/password
You're looking for Frequencies, Power Levels, SNR, etc

View solution in original post

mvnssa
Level 2: Rookie

Re: Cable Adapter & Smart Modem Gen 2 Issue

cable modem.GIF

Level 24: Supreme Being
Level 24: Supreme Being

Re: Cable Adapter & Smart Modem Gen 2 Issue

It definitely looks like there is a cable fault. Check that cable connecting adapter to coaxial wall socket is not lose.

 

This is what a good cable connection should look like.

 

Connection Settings
Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel438000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
Configuration FileOKcable_u1_tr2_netgear_docsis3
SecurityEnabledBPI+

 

Downstream Bonded Channels
Lock StatusModulationChannel IDSymbol Rate (sym/sec)Frequency (Hz)Power (dBmV)SNR (dBmV)DOCSIS Locked
LockedQAM25696952000 sym/sec438000000 Hz0.6 dBmV40.3 dBEuroDOCSIS
LockedQAM256106952000 sym/sec446000000 Hz0.8 dBmV40.4 dBEuroDOCSIS
LockedQAM256116952000 sym/sec454000000 Hz1.2 dBmV40.8 dBEuroDOCSIS
LockedQAM256126952000 sym/sec462000000 Hz1.8 dBmV40.9 dBEuroDOCSIS
LockedQAM256136952000 sym/sec470000000 Hz1.9 dBmV40.9 dBEuroDOCSIS
LockedQAM256146952000 sym/sec478000000 Hz1.3 dBmV40.8 dBEuroDOCSIS
LockedQAM256156952000 sym/sec486000000 Hz0.7 dBmV40.3 dBEuroDOCSIS
LockedQAM256166952000 sym/sec494000000 Hz0.4 dBmV39.9 dBEuroDOCSIS

 

Upstream Bonded Channels
Lock StatusModulationChannel IDSymbol Rate (Ksym/sec)Frequency (Hz)Power (dBmV)
LockedATDMA295120 Ksym/sec42600000 Hz38.3 dBmV
Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV

 

Downstream between -15 to +15dBmV is good.
Closer to 0.0dBmV the better.

Upstream between +40dBmV to 54dBmV is good.
Closer to 40dBmV the better.

SNR +38dB and above is good.
40+dB the better.

https://forums.whirlpool.net.au/archive/2504710

 
 
mvnssa
Level 2: Rookie

Re: Cable Adapter & Smart Modem Gen 2 Issue

Thanks. I also noted this under the Modem Status.

cable modem1.GIF

mvnssa
Level 2: Rookie

Re: Cable Adapter & Smart Modem Gen 2 Issue

Thanks, I have unscrewed and reattached the cable on both the cable adapter and wall plate several times. The internal cable (pin) is not bent and is screwed in tightly.

Level 24: Supreme Being
Level 24: Supreme Being

Re: Cable Adapter & Smart Modem Gen 2 Issue

Have you lodged a fault with Telstra? There is probably a fault were your cable from the premises taps into the main street cable.

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mvnssa
Level 2: Rookie

Re: Cable Adapter & Smart Modem Gen 2 Issue

Yes I have, but I always like to know what the possible issue is before a tech arrives, hence my post. I assume the fault might be in the Telstra / NBN cabnet, where additional adapters were installed a few weeks ago?

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