FAQ/How to display a text message to the phone in order to appear on the display

From Snom User Wiki

Answer

Text messages (desktop messages) to the idle screen of the snom3xx phones, follow these steps:

1) Configure these settings on the phone´s web interface

Support broken Registrar to "on"
Filter Packets from Registrar to "off"
Network identity (port): 5060
Clear Desktop Message on Cancel --> "off" -> message stays permanently --> "on" -> message can be deleted via "Cancel" key

2) Re-boot (!!) the phone but do NOT reset it! 3) Set up at least one identity (e.g. 486@mypbx) on the phone and select it as outgoing identity. 4) Install SIPSAK on any computer in your network (Linux/ Windows versions available) and enter the following command:

sipsak -i -M -B "Test" -s sip:493@phoneIP

5) Result: The message "Test" will be displayed depending on the phone type:

• snom360: line above the softkey icons (overwrites the )
• snom320: 1st line between date and time
• snom300: 2nd line

Troubleshooting

• See the SIP trace in order to check if the SIP message has reached the phone e.g.:

MESSAGE sip:493@phoneIP:5060;...

• The message is sent to a specific identity on the phone, e.g., sip:493@phoneIP therefore the phone must be set to that identity before (!!) --> The message can be matched then and the phone answers "200 OK" otherwise "404 Not Found"

Note: Starting from firmware V6, it is also possible to show special messages for a particular call as long as the Call-Id matches the current call. An example of that MESSAGE method would be:

MESSAGE sip:153@192.168.1.110:3387 SIP/2.0