Cisco CCNA / CCNP Certification Exam: Caller ID Screening And Callback
As a CCNA and/or CCNP candidate, you’ve got to be able to spot situations where Cisco router features can save your client money and time. For example, if a spoke router is calling a hub router and the toll charges at the spoke site are higher than that of the hub router, having the hub router hang up initially and then call the spoke router back can save the client money (and make you look good!)
A popular method of doing this is using PPP callback, but as we all know, it’s a good idea to know more than one way to do things in Cisco World! A lesser-known but still effective method of callback is Caller ID Screening & Callback. Before we look at the callback feature, though, we need to know what Caller ID Screening is in the first place!
This feature is often referred to simply as “Caller ID”, which can be a little misleading if you’ve never seen this service in operation before. To most of us, Caller ID is a phone service that displays the source phone number of an incoming call. Caller ID Screening has a different meaning, though. Caller ID...
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