After you upgrade CTS to 1.7 , you will not able to get IP Phone screen or connect to IP Phone via Phone remote application. When you try to connect to screenshot link http://<IPPhone_IPADD>/CGI/Screenshot you will receive following message CiscoIPPhoneError Number="4".
This problem didn't occur with CTS version 1.6 or lower version.
This is not a CTS 1.7.0 limitation but a CUCM/Phone limitation [Change with CUCM 8.0] . The phone asks the codec for authorization and now due to security change the codec will deny the request starting release 1.7.
This is an unofficial workaround.
In 1.7 we have a limitation that we can get the screenshot for the Phone.
Able to access the screenshot for testing purposes only in following way.
1:Make sure the Authentication url is configured on the System >Enterprise parameters on the CUCM server Pointing to CUCM server ( Make sure the Hostname if that Url is Host name is resolvable by Phone) 2:Remove any authentication Server on the IP phone configuration. Please make sure you reset the Phone so that the Authentication URL get Updated On Phone Via new TFTP config Phone Downloads on the reset. 3:As this phone is already controlled By Application user ( For this the CTSman Application user ) 4:You can get the screen shot http://<Ip phone address>/CGI/Screenshot 5:Enter the CTSman account to log in to get the screen shot.