Docsis chat

Does anyone now if there is a way to limit the cable modem upstream power ?
Specifically I need to limit the cable modem to 50 dbmv max upstream.
System is a BSR2000 with SB5101 modems.

Thanks.

Hi!

Does anybody have a fairly new firmware for Toshiba PCX2600 or PCX2500 modems lying around? I have pcx2600_na_1_0_14_01_d10.img and pcx2500_1_0_14_d10.img. Does anybody know if there are newer releases available? Toshiba ended their CM support some time ago.

/Fredrik

Still pretty green at this, so here goes.

My biggest problem is that the modems are binding to the first CPE MAC address they see and do not permit other CPE devices until they (modems) have been offline for the uBR's 24 hr. host expiration time. 'clear cable host' does no good either. I've set max hosts to 8 on the uBR as well as max CPE's to 8. Still no dice. Modem configs have anywhere between 3 and 8 CPE's permitted. Various Surfboard, ARRIS, and Ambit modems all exhibit the same behavior.

Hi guys, i'm working with a CMTS C3 and cable-modem motorola 5120/5121, i need use the telephony part of the modem, i searched on the web and found that the new firmware from this cable is supporting SIP, if is that true, how can i upgrade the firmware ? And if not true, how can i integrate with my CMTS ? I tried everything on my dhcp linux server, but when the cable cames on, the ata dont ask for ip, i have activated on cmts cable-helper-address for host and for cable. What i need configure on C3 ?

This is what happens...
just a few days ago we got bad SNR levels and and did not know the reason.
after searching we found that the downstream signal was poor, in the headend.
then we take the measurement of downstream directly on the CMTS (downstream port) and results that was delivering 28dB,
not 50dB like is in the CMTS configuration.

Then i Read this:
This problem is common after 5-6 years of usage and it can be repair, the upconverter (which produces the downstream signal).

its possible to route through two cable modems? as a kind of VPN.
Using a CMTS that has the ability to route as the UBR.

Modems come online but will not pass Ethernet traffic. Ethernet is programmed for 1 which is active.
Any ideas?
Thanks

I have a bunch of these modems that I want to load the SIP firmware on. I want to use them with my own asterisk solution. I have already applied the asterisk patches to my servers I just have no idea how to:

1. Acquire the required software / firmware (bought second hand off ebay and Arris wont help)
2. Create or push it to the device

I have configured Arris properly but i have one problem with dhcpd.

I get this error all the time.

Jul 12 04:51:01 linux-0zbt dhcpd: DHCPDISCOVER from 00:1e:6b:1e:31:2e via 10.248.0.252: network 10.248.0/24: no free leases
Jul 12 04:51:05 linux-0zbt dhcpd: DHCPDISCOVER from 00:1e:6b:1e:31:2e via 10.248.0.252: network 10.248.0/24: no free leases
Jul 12 04:51:14 linux-0zbt dhcpd: DHCPDISCOVER from 00:1e:6b:1e:31:2e via 10.248.0.252: network 10.248.0/24: no free leases

Hi everybody!
I have a big problem with my CMTS Cornerstone 1500. Before 4 days, it was necessary to reset the mashine.
After reset everething is going down.:( All adjustment going out.
We are small ISP with very small subscribers.There is 160 modems.I`m not specialist of CMTS andd that was so hard to me, to set right parameters.
Please help me to set right. I`ve not configuration file. :( This is disaster..... I must say: I`m woman :).There is my setting for up and downstream.(Two upstreams 4 and 5)

Downstream:
frequency:423000000 herz
width: 6000000 herz
modulation: qam256