No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Voice Feature Guide 01

Rate and give feedback :
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Local Tone

Local Tone

The softswitch/IMS or AG can play tones to terminals. Tones played by the AG are called local tones. Before enabling the AG to play local tones, load a tone file to the AG. For parameter tones, configure them on the AG.

Tone File

Signal tone standards vary depending on country requirements. As shown in Figure 1-15, customize a tone file, load the tone file to the AG, and the AG plays the customized tones, such as dial tone, ring back tone, and busy tone during calls.
Figure 1-15 Tone played by the AG using the tone file

Voice files, generally named voice.efs, are stored in the flash memory of a control board. A voice file describes the tone playing types supported by the DSP. The description covers the signal tone type, frequency, duration, and level. After the system is initialized, tone playing parameters are configured on the DSP. When the system requests to play a tone for a subscriber, the DSP reads the configuration and generates the desired signal tone on a real-time basis.

The signal tones specified in a voice file can be parameter tones, waveform tones, or announcements.
  • Parameter tones are simple tones, including dialing tones, busy tones, and ring back tones. The system issues parameter tone attributes, such as the frequency, energy, duration, and cadence, to the DSP. The DSP then generates parameter tones.
  • Waveform tones are simple tones. The system records these tones into a voice file and stores the file in the flash memory of a control board. Whenever a board starts up, the voice file is loaded to board DSP. When the system needs to play a waveform tone for a subscriber, the DSP plays the recorded voice data for the subscriber.
  • Announcements are audio messages played to subscribers, such as "The subscriber you dialed is busy. Please call later." The system records announcements into a voice file and stores the file in the flash memory of a control board. Whenever a board starts up, the voice file is loaded to board DSP. When the system needs to play an announcement for a subscriber, the logic or DSP plays the recorded voice data for the subscriber.

In addition to voice file recording, the system supports parameter tone customization. A customized parameter tone takes effect in the next tone playing, which does not require service board resetting.

Customized Parameter Tones

Users can customize a parameter tone by specifying a series of cadences and tone playing rules. Each cadence defines the signal frequency, energy, and duration.

In a parameter tone, cadences can be played in one of the following ways:
  • Sequential play: Each cadence is played once in sequence according to the break-make ratio.
  • Continuous play: All cadences are cyclically and continuously played according to the break-make ratio.
  • Cyclic play: All cadences are cyclically played and the number of cycles can be defined.
NOTE:
In a parameter tone, continuous cadences can be cyclically played. For example, in Figure 1-16, special dial tone cadences 1 and 2 can be continuously played. When configuring a cadence cycle, ensure that the following requirements are met:
  • The cycle end cadence must be greater than the cycle start cadence. The start and end cadences must have been configured.
  • If multiple cycles are configured, the start cadence of the next cycle must be greater than or equal to the end cadence of the previous cycle. In addition, the cadences in each cycle cannot overlap or nest. For example, a parameter tone contains eight cadences, cadence 1 through cadence 8, and cycle 1 contains cadences 1, 2, and 3. Then, the start cadence of cycle 2 must be greater than or equal to cadence 3 and cannot contain cadence 1 or cadence 2.
A cadence contains the following items:
  • Frequency: A cadence can contain only one frequency, two frequencies, three frequencies, or four frequencies.
  • Energy: The energy obtained when the POTS gain is 0 dBm and the line length is 0 km is used in this section.
  • Play mode: A cadence can be played only once or repeatedly played according to the break-make ratio. If the cadence is configured to repeatedly play, the number of plays is not limited.
Figure 1-16 shows ring back tone, reject response tone, and special dial tone diagrams.
  • A ring back tone is continuously played with a single cadence. The cadence contains one frequency, which is 425 Hz. The energy is -10 dBm. The cadence is played according to the break-make ratio. That is, the cadence is played for 1250 ms and stopped for 3750 ms.
  • The reject response tone is cyclically played with a single cadence. The number of cycles is 3. The cadence contains two frequencies, which are 300 Hz and 450 Hz, respectively. The energy is both -20 dBm. The cadence is played according to the break-make ratio. That is, the cadence is played for 200 ms and stopped for 200 ms.
  • The special dial tone is continuously played with two cadences, cadence 1 and cadence 2.
    • Cadence 1 contains one frequency, which is 420 Hz. The energy is -10 dBm. The cadence is played only once and the duration is 1000 ms.
    • Cadence 2 contains two frequencies, which are 380 Hz and 420 Hz, respectively. The energy is both -10 dBm. The cadence is played only once and the duration is 1000 ms.
Figure 1-16 Example of generating parameter tones

Feature Dependencies and Limitations

  • Users only can customize parameter tones. If the AG is required to play a waveform tone or announcement, a voice file is required.
  • If a parameter tone is both customized and configured using a voice file, the customized configuration preferentially takes effect.
  • After the voice file is loaded or parameter tones are configured on the AG, and the softswitch or IMS issues tones, tones issued by the softswitch or IMS take effect preferentially. If the softswitch or IMS does not issue tones, the voice file loaded or parameter tones configured take effect preferentially.
Translation
Download
Updated: 2019-02-22

Document ID: EDOC1100067358

Views: 12829

Downloads: 116

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next