Cable Forum - View Single Post - Superhub What could possibly have gone wrong?

Eeeps · 10-07-2012, 15:20

On the original question about how more channels can lead to higher jitter...

Could be that they peformed some channel load balancing when they added the extra channels. Some of the folks sharing your cable segment have probably got much better broadband connections now.

Regarding the cause of jitter...

On the downstream jitter is caused by the buffering of packets in the CMTS because other users packets are waiting to be transmitted on your channels (or indeed your own packets if you are receiving more than your bandwidth provision).

Upstream jitter can have numerous causes but typically result from the delays in the granting of data transmission opportunities by the CMTS. These occur when all available upstream slots are being used by other modems (or your modem is attempting to exceed the provisioned transmission rate).

10-07-2012, 15:20	#15
Eeeps cf.addict Join Date: May 2012 Posts: 153	Re: What could possibly have gone wrong? On the original question about how more channels can lead to higher jitter... Could be that they peformed some channel load balancing when they added the extra channels. Some of the folks sharing your cable segment have probably got much better broadband connections now. Regarding the cause of jitter... On the downstream jitter is caused by the buffering of packets in the CMTS because other users packets are waiting to be transmitted on your channels (or indeed your own packets if you are receiving more than your bandwidth provision). Upstream jitter can have numerous causes but typically result from the delays in the granting of data transmission opportunities by the CMTS. These occur when all available upstream slots are being used by other modems (or your modem is attempting to exceed the provisioned transmission rate).