R2511-HP MSR Router Series Layer 2 - WAN Command Reference(V5)

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ppp callback
Use ppp callback to specify the interface as the server or client to send or accept PPP callback requests.
Use undo ppp callback to disable the interface as the PPP callback server or client.
Syntax
ppp callback { client | server }
undo ppp callback { client | server }
Default
Callback is disabled.
Views
Dialup interface (physical or dialer interface) view
Default command level
2: System level
Parameters
client: Sends callback requests as the PPP callback client.
server: Accepts callback requests as the PPP callback server.
Usage guidelines
PPP callback adopts the client/server model where the calling party is the callback client and the called
party is the callback server. The client first originates a call, and the server decides whether to originate
a return call. If a return call is needed, the callback server disconnects and then originates a return call
according to the information such as username or callback number.
This is useful for saving cost in the case that the call rates in two directions are different.
Examples
# Configure interface Serial 2/0 as the PPP callback server to accept callback requests.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] ppp callback server
ppp callback ntstring
Use ppp callback ntstring to configure the dial number required for a Windows NT server to place return
calls to your router.
Use undo ppp callback ntstring to remove the dial string.
Syntax
ppp callback ntstring dial-number
undo ppp callback ntstring
Default
No callback dial string is configured for any Windows NT server.
Views
Dialup interface (physical or dialer interface) view