The “Hello World” text message was sent from extension 800 (IP 192.168.1.100) to extension 584 (192.168.1.84). This is an Asterisk 1.4.26 running on CentOS 5.3, the phones are Unidata WPU-7700 capable of text messaging, and they work fine with voice through Asterisk.
It looked like the message did arrive to Asterisk but could not get routed to the recipient, the error was “405 Method not allowed”.
No specific setup was made on the Asterisk side to accommodate SMS, whatever default setup for SMS was used.
I am quite excited with this feature, so any help sorting it out is greatly appreciated!