A multi function device failure in the far reaches of Australia requiring a quick re-route of the line from ISDN in to PSTN out and ‘boom’ we’re up and running again.

From:
dial-peer voice 1001 pots
description *** Site Fax Number
destination-pattern 0001
port 0/2/0
forward-digits all

To:
dial-peer voice 1001 pots
trunkgroup ISDN_OUT
description *** Forwarded to PSTN (used to be port 0/2/0)
destination-pattern 0001
forward-digits 0
prefix 91234567 [<< the new number]