Avaya CPSEE_TSP500 manual Text-To-Speech TTS Messages Feature

Chapter 4 Features and Enhancements

Text-To-Speech (TTS) Messages - Feature

The ability to play an arbitrary TTS voice message has been added to the TSP500. The creation of the TTS message is not the responsibility of the TSP500, but the TSP500 must have read access to the message. Access to the message is provided by a Samba mount to an external drive. The external drive is mounted locally to the path /home/tts. To ensure the drive is mounted, an entry in the /etc/fstab file must be inserted. The format of the entry is:

//<IP Address>/<external directory path> <local directory path> username=<name>,password=<pass- word>,<additional options> 0 0

Example:

//10.2.109.4/tts /home/tts smbfs user- name=eisadmin,password=admin,defaults 0 0

The term “defaults” equivocates to “rw,suid,dev,exec,auto,nouser,async” per- missions.

The Adjunct needs to know the audio output format in order to create a voice message that can be played. The current Protocol C Message to send resource information to the Adjunct has been modified to include encoding format, bandwidth, and bit resolution. When the Adjunct starts and requests resource information, an additional resource message (M_GET_RESOURCES) with a mode value of 4 is sent. This message is sent prior to the resource message with a mode value of 3 for backward com- patibility. This message includes three data fields for TTS voice specific parameters. The first “data” field contains the encoding format and can have a value of 0 for Mu-Law and 1 for A-Law. The second “data” field contains the bandwidth and is always 8000, since a bandwidth of 8K is only supported. The third “data” field contains the bit resolution and is always 8, since a bit resolution of 8-bit is only supported.

When play voice message request (M_MSG_PLAY) is received, the TSP500 determines if the request can be performed. The “flag” field descriptor with the number one indicates the voice message is to be played immediately. The play immediate option indicates the message is to be played immediately using the trunk’s DSP. Otherwise, the message is placed on a one-second- timer queue and an Encore DSP is used to play the message. The “key” field descriptor may contain a voice message name or (optionally, a relative path and) a filename and extension. If the “key” has an extension, a search of the Text-To-Speech directory (/home/tts) for the existence of the “key” is per- formed. Otherwise, a search of the Encore directory (/usr/vox) for the “key” plus “wav” extension is performed.

When the non-interruptible voice message completes playing, a route request (M_ROUTE_REQ) is sent to the Adjunct with a result code indicating the voice message completed (SWR_MSG_PLAY_DONE).

CPSEE_TSP500 User Guide	Version 4.0	Page 4-7
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