4.1 Terminal-Based Communication

2N^® VoiceBlue MAX allows for communication via the TCP/IP Telnet protocol. The maximum count of active Telnet sessions is ten. If there are more Telnet connection requests than ten, the GSM gateway rejects the connection.

Terminal

2N^® VoiceBlue MAX acts as an ANSI terminal with echo. Text commands are entered in one of the following formats: AT[command]<CR>, or AT[command]<CR><LF>. The answer consists of up to several rows, an empty row with <CR><LF> and the reply type: OK, ERROR, or BUSY. Use A/<CR> to repeat the command.

The gateway requests a password by displaying the Login: and Password: prompts. It uses an extended set of AT commands for configuration. Refer to Subs.4.2 for the list of terminal AT commands.

Example of a login window:

• [ VoiceBlue MAX ] V–1.9.0.11.0 B–1.20
• Date/time: 4.1.2013/20:56:53.98
• SNumber: M204–5401270008
• Login: Admin
• Password: **

Access Data

2N^® VoiceBlue MAX receives Telnet requests on port 23. Port 23 can not be reconfigured.

The access password and name are identical with those of the web interface. The access data cannot be changed from the gateway Telnet interface (only from the web interface) for security reasons.

Refer to Subs. 2.2 for access data factory settings.