Patton 3086FR, Руководство пользователя

Страница: 98 / 170

DSLAM Connections with remote CPE units 98
Model 3086FR ATM IAD User Guide 8 • 3086FR routed and bridged ATM connections
4. Go to G.SHDSL in the Configuration Menu, then the submenu Status. The Modem State should be
“deactivated.” (If not, go to the Action and change it to deactivate.)
Then in the Action submenu under G.SHDSL, change Action to Start, then click on Action.
The modems should link up within 30 seconds or so and the link is ready for communication.
PPPoA Routed (RFC 2364)
This routed application is very similar to the PPPoA Bridged application. The user data for transmission is in
the form of IP packets but encapsulated in a PPP packet, transmitted and received through a PPP session to the
connection. The PPP packets are encapsulated according to RFC 2364 for transmission over the ATM link.
The packets are de-encapsulated on the receive side so that the IP data can be delivered to the end user.
The Central (Model 3086FR) end functions as a local ISP which will authenticate the Remote user (Model
3086FR). The CPE side, with Remote and 3086FR-A, may represent a home PC which is connecting to a cen-
tralized PPP server (Local and 3086FR—B).
Since this is a routed application, there are differences to be noted. Referring to the application diagram, three
unique subnets exist. The Ethernet LAN on the 3086FR and Remote side, the Ethernet LAN on the 3086FR
and Central side, and lastly, the subnet of the ATM’s PVC link between the two modems, 3086FR-A and
3086FR-B. The 3086FR-B and Local end (the Central side) may also be a DSLAM.