Specifying Fixed-Length Numbers

Use fixed-length properties to specify the fixed-length numbers in phone extensions and pager numbers to improve speech recognition.

Important: Vocera recommends that you contact Vocera Technical Support to implement any customization to the properties.txt file.

As a best practice, you should constrain telephone extensions and pager numbers to a fixed length. Fixed-length numbers can improve speech recognition, because they eliminate from the grammar all possibilities that are not of the specified length. The following properties in /opt/vocera/server/properties.txt specify the number of digits in fixed-length phone extensions and pager numbers.

Property Description

TelExtensionLength

Specifies the number of digits in an extension.

The default value is 0, which means that a variable length is accepted. A value of 0 through 7 specifies an extension of the given length.

TelPagerNumberLength

Specifies the number of digits in an internal pager system number.

The default value is 0, which means that a variable length is accepted. A value of 0 through 7 specifies a pager number of the given length. It can be used in conjunction with the Page Number voice command (for example, “Page number 1234”).

Note: If you modify the properties.txt file, you must stop and start the Voice Service to load the properties into memory.