Docsis chat

Hi, everyone
A while ago I've noticed that we have quite a high latency in our network. Ping from a cable modem to CMTS gives me about 5-6 ms latency with random bursts to 15-20 ms. Is that normal? In a regular twisted pair LAN I've never seen anything above 1 ms even if the ping test was making it through a chain of cheap asian switches. Please, could anyone take a look what latency do you get in the network, are there bursts like in ours.

Thanks in advance

I'm trying to source for engineers with DOCSIS experience as a part of a retained search. I want to have a better understanding about the technology so I can do the right searches. I have a hard time finding the right candidates that open to hear of opportunities and open to relocating. Can anyone suggest some best practices to use to source for these type of candidates??? Thanks, Kristin (Kguldin@readytohire.com)

Hey,

I got the arris SIP firmware, installed it. I did some research and found some instructions for configuring arris for SIP at http://docsis.org/node/244.

The thing is that when I try to set a new value for MIB arrisMtaDevProvMethod I get an error saying no access. Does anyone know why this is happening ?

Hello, who use docsis server software?

How can i enable there dhcp option 122?

Thanks in advance

Hi all

I am trying to configure VoIP lines for Arris MTA502g. I have a SIP proxy where to register it.

The problem is that tha MTA has packetcable firmware by default. Can anyone pass me along a SIP firmware file for it?

Thanks a lot,

Manuel.

Hi all,
I wanted warn all you guys who use arris cornerstone 1500 CMTS.
Disabling default SNMP acceslist entery disables ANY MANAGEMENT. You can't login by telnet, CLI etc.
Don't make the same mistake I did: don't disable default SMNP acces entry or even better: don't buy that CMTS at all ;-)
BTW: since 1000 is almost the same as 1500 it should also has the same effect on 1000.

John

My provisioning system is finally coming together and I'm polishing up the monitoring part. I've dug through the MIB tables (for modems) and pulled out what I think are important to be able to see, but I'm curious what other ones (that I may have overlooked) would be a good addition.

So far I have:

uptime: 1.3.6.1.2.1.1.3.0
TX power: 1.3.6.1.2.1.10.127.1.2.2.1.3.2
RX Power: 1.3.6.1.2.1.10.127.1.1.1.1.6.3
SNR: 1.3.6.1.2.1.10.127.1.1.4.1.5.3
microreflections: 1.3.6.1.2.1.10.127.1.1.4.1.6.3
resets: 1.3.6.1.2.1.10.127.1.2.2.1.4.2
lost sync: 1.3.6.1.2.1.10.127.1.2.2.1.5.2

Hi all,
We have 2x arris 1500 running on 3,2MHz QPSK upstreams. Theoretically there is 5Mbps of bandwidth available per upstream. But when US utilization is at 50% rtt is about 20 ms. When it reaches 70% it is almost unusable - 50-60ms. On average there is 70-80 modems connected per US.

Is there any way of using 70-80 % of US bandwidth and not making delays so big?

Hello,

I do not run an ISP. I am just interested in DOCSIS, and have a question about a particular scenario, so I hope that's ok. An unknown modem is plugged into the cable network with an HFC MAC address that is not from a paying customer. It gets the config file "unknownmodem.bin", which is shown at the bottom of this post.

Does anybody has deployed Wireless Docsis for VoIP and Data Support?