This maintenance window will only affect Cisco 6945 phone handsets at UBC.
In order to correct an identified issue with DTMF (touch tone dialing), UBC IT will be upgrading the software on Cisco 6945 handsets between 23:00 and 23:30 on March 19, 2015.
Cisco 6945 handsets will be unavailable for up to 5 minutes as their software is upgraded. If a 6945 phone is in use, the upgrade for that phone will not begin until the call has been concluded.
All other Cisco phones will operate normally during this change window.