Bosch Appliances 3.5 manual Operation, Voice response menu

Praesideo 3.5 Installation and User Instructions 11 Optional Software

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61.6 Operation

Making calls via the PC Telephone Interface Client requires the user to follow a voice response menu. The PC Telephone Interface uses predefined calls defined in the PC Call Server to select call properties. These calls are always partial. The live speech phase of a PC Telephone Interface call is recorded first and broadcast after the call has been completed successfully.

The soundcard audio output of the PC running the

PC Telephone Interface is coupled to an audio input of the Praesideo system if calls with live speech will be made. Make sure that all predefined calls with live speech that are to be used by telephone have this audio input configured as live speech input.

This means that predefined calls that are to be used by both PC Call Station Clients and PC Telephone Interface Clients should not contain live speech, since these clients use different Preaesideo audio inputs for live speech. If this predefined call should contain live speech, then two almost identical versions of this predefined call (with different names) should be configured for the PC Call Server, one for the PC Call Station Client with e.g. a call station microphone as input, the other for the

PC Telephone Client with a line input configured as live speech source and connected to the PC soundcard output.

Configure port number 5060 for the PC Telephone Interface Client for direct access via a softphone, like ZoIPer (www.zoiper.com).

61.7 Voice response menu

A voice response menu guides the caller to enter the data, required to make a call. For this purpose a number of different gsm-files are available in English. The gsm-file format is typically used for this kind of telephone applications. It is a compressed sound file format. The user or installer can replace these sound files with files that are more convenient for the intended users, e.g. in the local language, more talkative or more condensed. For this purpose sound file editors and converters are available on the Praesideo distribution DVD. With these editors (e.g. WavePad, Audacity) a recording can be made in the uncompressed wav-file format. Then these files can be normalised to maximum level and/or optimised in other ways for good intelligibility. It is recommended to use a high pass filter to remove frequencies below 300 Hz, as these low frequencies severely decrease intelligibility of the gsm-files. Finally the files must be converted (using SoX or WavePad) to the gsm-file format at 8kHz sample rate. The names as indicated in table 61.1 should be used, because the PC Telephone Interface Client expects to find these. Do not translate or change these file names. Command line conversion from wav-file format to gsm-file format via SoX is as follows:

sox.exe "<Source filename>.wav" -r 8000 "<Destination filename>.gsm"

Because the telephone interface is based on the Asterisk telephony platform, which is designed to run on Linux, a Cygwin environment is installed on MS Windows and the sound files are located in the folder \<AsteriskRoot>\var\lib\sounds. This is usually C:\cygroot\asterisk\var\lib\sounds.

Bosch Security Systems 2011-02