Abbreviated dialing is an extension of speed dials. Check the following URLs
http://www.cisco.com/en/US/customer/docs/voice_ip_comm/cucme/admin/configuration/guide/cmespeed.html#wp1021955
and here:
http://www.cisco.com/en/US/customer/docs/voice_ip_comm/cucme/admin/configuration/guide/cmespeed.html#wp1010702
HTH.
Regards,
Bill
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