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Voice Feature Guide 01

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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).
The Principles of ISDN PRA

The Principles of ISDN PRA

The PRA call process is the same as the BRA call process. For the BRA call process, refer to The Principles of ISDN BRA.

  • One PRA user has 32 time slots with the rate of 64 kbit/s. Among the 32 time slots, time slots 1-15, 17-31 are for the B channel, time slot 16 is for the D channel, and time slot 0 is for frame synchronization.
  • For a PRA user, the TEI of the L2 link is 0.
  • For a PRA user, the working mode and power supply mode are not included. The terminal is powered by the PBX.
Updated: 2019-02-22

Document ID: EDOC1100067358

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