EXHIBIT 23.6


                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the inclusion of
our report dated February 9, 2000 in this Form S-4 and to all references to
this firm in the Proxy Statement/Prospectus of Mustang.com, Inc. and Quintus
Corporation. It should be noted that we have not audited any financial
statements of Mustang.com, Inc. subsequent to December 31, 1999 or performed
any audit procedures subsequent to the date of our report.

                                        /s/ ARTHUR ANDERSEN L.L.P.


Los Angeles, California
March 24, 2000


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