Docsis chat

We provide internet and cable for a handful of apartment complexes ranging between 100 and 500 tenants per complex. Internet subscribers on these sites range between 20 and 200 (with possible future growth to around 400). Currently we are using C9Networks CMTS's, which have the CMTS, upconverter and all related servers (DHCP, tftp, tod) in a single box. We are in the process of expanding our internet offerings at the larger properties and are looking for a more robust, better scalable solution.

Hello
I need setting up CMTS BSR 2000. I read manual for this CMTS and test setting something command but configuration is no ok.
Maybe anybody have example configuration for this CMTS ?
Over it I need something software to managing CM (adding ,removing, ...) .
Thanks

Hi all,

Does anybody know how we can block traffic between hosts behind cable modems connected to the same Arris C3 CMTS? And could we define it based on IP subnet or protocol?

Regards,
Astrit,

Hi all,

Is there anyone who can tell me what the values of SNR and CNR must be to have an good signal.

And if my levels are bad, what will happen?
e.g. will my upstream drop from 16qam to qpsk, or will it yust be dead?

I now have: SNR 22.6dB and CNR 20dB. I expect thats a bit low ?

thanks,
W.

Hi all,

During testing, i've discovered that my US is in QPSK, although my CMTS modulation profile is:
cable modulation-profile 222 request 0 16 0 22 16qam scrambler 152 no-diff 32 fixed qpsk1 1 2048
cable modulation-profile 222 initial 5 34 0 48 16qam scrambler 152 no-diff 64 fixed qpsk1 1 2048
cable modulation-profile 222 station 5 34 0 48 16qam scrambler 152 no-diff 64 fixed qpsk1 1 2048
cable modulation-profile 222 a-short 4 76 7 22 16qam scrambler 152 no-diff 64 shortened qpsk1 1 2048

hi all,

in test setup my docsis 2.0 speeds are : DS --> 37Mbits/s and US --> 305kbits/s

DS i'm satisfied, but US is a disaster...

Anyone an idee ??

Here my CM config file (CM = Scientific Atlanta Webstar)

Main
{
NetworkAccess 1;
MaxCPE 2;
UsServiceFlow
{
UsServiceFlowRef 2;
QosParamSetType 7;
TrafficPriority 1;
MaxRateSustained 30000000;
MaxTrafficBurst 65224;
MinReservedRate 25000000;
}
DsServiceFlow
{

I am a cable operator looking for someone who could set up an all inclusive solution for provisioning, etc. to launch my Arris 1000 CMTS in a new system. If you would send me your info at office@mptelco.com. Looking to move quickly. Thanks.

Hello DOCSIS community,

I have a strange problem on some of the Terayon Bluewave CMTSs. These boxes have been in service for a couple of years now, without major problems. I use DOCSIS2.0 modems and configurations only, I don't have any older modems. The thing that happens is, some of the CPEs cannot access the DNS servers. Here are the simptoms:

- modems register without problems
- CPEs receive their IPs and other stuff from DHCP no problem
- CPEs CAN ping anything on internet (based on IP only)
- CPEs CANNOT resolve any FQDN

The C3 logs show

FEB 01 09:25:30: %C3-5-R102.0: Retries exhausted for polled CM - MAC Addr: 001a.6660.8174
FEB 01 09:25:30: %C3-5-R104.0: Failed to receive Periodic RNG-REQ from modem (SID 46),timing-out SID.
FEB 01 09:29:33: %C3-5-R101.0: No Ranging Requests received from POLLED CM (CMTS generated polls). (16 logged)
FEB 01 09:29:33: %C3-5-R102.0: Retries exhausted for polled CM - MAC Addr: 001a.6660.8174
FEB 01 09:29:33: %C3-5-R104.0: Failed to receive Periodic RNG-REQ from modem (SID 46),timing-out SID.

and the modem time out.

To date I am familiar with the Arris TM5XX and SA Webstar series eMTA being used in the US.

Any operators in the US using Thomson THG-540 for VoIP. If so, what CMTS are using.

Is it available through NCTC?