Provider shall make an initial response to a Severity 1 maintenance call within two (2) hours after receipt. Application Provider shall use best efforts to provide a fix, work around, or to patch Severity 1 bugs within twenty four (24) hours after the bug is replicated by Application Provider and confirmed as a bug by Application Provider. Source: INVENDA CORP, S-1/A, 8/28/2000 h) Provided that maintenance calls are received within Application Provider's maintenance hours, Application Provider shall make an initial response to Severity 2 maintenance calls within four (4) hours after receipt. Application Provider shall make commercially reasonable efforts to provide a fix or work around for Severity 2 bugs within five (5) business days. i) Provided that maintenance calls are received within Application Provider's maintenance hours. Application Provider shall make an initial response to Severity 3 maintenance calls within twenty-four (24) hours after receipt. Application Provider shall make reasonable efforts to identify a resolution to Severity 3 bugs within thirty (30) days. j) Provided that all maintenance calls are received within Application Provider's business hours, Application Provider shall make an initial response to Severity 4 maintenance call within forty-eight (48) hours after receipt. Severity 4 issues will be dealt with on a case-by-case basis and no blanket commitments will be made. k) Excite@Home shall appoint one (1) person as the principal point of contact for the communication of bugs and errors to Application Provider and for the receipt of bug and error fixes, work arounds and updates, if any. Additionally Excite@Home may appoint another person as a backup of the principal contact. 2. UPTIME GUARANTEE a) The Co-Branded Application shall not experience more than two outages (unscheduled downtime) of more than two hours during any one month. In addition, the Co-Branded Application shall have at least the following uptime