Yes, they are economical if there purpose is to serve as just lobby phones. It does not have some of the features of 7910 like On-hook dialing and SWitch port, etc., I am also not sure of SRST support on 7905.
I take back my word on the "On-hook dialing". It seems there is support for this on 7905 as well. The other key differences i see in this table are H323 support, Dynamic softkeys support and Pixel Display in 7905 which are absent in 7910. So Decide it yourself.
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...