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XXS - tiny
XS - extra small
S - small
M - medium
L - large
Home / Building a DOCSIS cable plant 
- First videoconference session using a Polycom SP attached to a cable modem.
- A DOCSIS cable plant on one table. The Cable Network Registration server is to the left with a number of cable modems on top. I
- Closeup of the routing equipment. The Cisco 2621 is configured to provide a simulated T1 frame-relay connection to the uBR7223.