For the sake of argument lets say that you do get SRST running on a 1711. The router does not support any Analog or Digital voice circuits anyway so you would be very limited with what it could do (extension to extension calling).
That being said I think you are just running into an issue with the feature navigator, all of the firmware docs for 2.1 - 4.0 do not list the 1711 as a supported platform.
Just to put a definitive end to this thread. We do not support CME or SRST on any routers other than the 1751, or 1760 in the 17xx family. We also do not support CME and SRST in the 18xx family. Smallest router today is the 2801 in the 28xx family.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...