Cisco Cisco Unified Customer Voice Portal 10.0(1)

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If the call fails (in this case, the amount of time the call had been in Unified CVP is
irrelevant), send the caller back through the PSTN via a hairpin transfer to 8009990000.

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Assume the PSTN switch is sending ANI and DNIS in such a way that the ANI and DNIS
are concatenated together in the DNIS field. Assume that ANI length is 10 and DNIS length
is 4. Also assume that ANI can be blank, e.g. blocked callerID.

The IOS configuration elements necessary to accomplish these cases is shown below.

Note: Dial-peers 2 and 4 are necessary in the event of no ANI (blocked caller ID). The lower
preferences of dial-peers 2 and 4 is to protect against the case where a caller's ANI begins with,
say, 45. For example, assume caller with ANI 4521111111 dials the sales DNIS. Without lower
preferences, the caller would have matched dial-peer 2 and gone to the billing application instead
of sales (you wanted it to match dial-peer 3).

The following are the configuration elements for the second example:

Configuration and Administration Guide for Cisco Unified Customer Voice Portal Release 4.1(1)