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elbm

join:2000-08-03
Reisterstown, MD
reply to FFH5

Re: Customers understand upgrading a network is hard & expensive

And they are still just listening to the financial guys. VZW is upgrading their transport to the towers by putting in new protected sonet rings, using Fujitsu FW4100s with gigE optical hand offs at all of their towers. ATT has opted to put Transparent Lan Service (TLS) to their towers which is basically ethernet over fiber. No protection, just two fibers vs four, no ability to switch paths, TLS is unregulated, sonet has FCC mandated response times, hits on a sonet ring are transparent to the user, hits on TLS take time to recover...... But tls is far cheaper the ethernet over sonet.

axus

join:2001-06-18
Washington, DC
Heh, you dug up the truth behind the "most reliable network" claims, eh?