Hello,
recently we put another CMTS in service in our network. I have defined new config files for modems that need to go to this CMTS. In that config file I specified it's downstream frequency and upstream channel ID to which I want them to connect. Most of the modems did that correctly, but we have some 10% that receive the file and then do nothing. It looks like they could not find that upstream channel.
When we install new modem on that same location, it connects without trouble. But when we return the old one, it does not want to connect. Both new and old modems use the same config file. When we change the config file for the old modem, and put config file that does not specify upstream channel ID, it connects without problems, but on some other upstream channel (usually upstream 1). All signals are normal, SNR is good and noise is under control.
Then I get in the situation that I have too much modems on single upstream and troubles start. 95% of my modems are Motorola 5101e and some are Scientific Atlanta (various models).
Can you post me suggestions at what can be wrong.
What cmts are they connected to? how is the return wired into the cmts receiver?
I'm thinking you've got 4 nodes that are combined and then feed 2 receivers at different freq. and your trying to load balance between them?