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


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


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).
Configuring the MoIP Service

Configuring the MoIP Service

This topic describes how to configure the H.248/MGCP/SIP-based MoIP service for transmitting the traditional narrowband modem data service over the IP network.


For the H.248/MGCP-based MoIP service:

For the SIP-based MoIP service:


The MoIP service can be transmitted in two modes:
  • One is the transparent transmission mode, also called the voice-band data (VBD) transparent transmission. In this mode, the MG adopts the G.711 coding to encode and decode modem signals, and processes modem signals as common RTP data. In other words, the MG does not process modem signals, and the modem modulation signals are transparently transmitted over the IP network through the VoIP channel.
  • The other is the redundancy mode, also called the relay mode.
Currently, the MA5600T/MA5603T/MA5608T supports the modem service only in the transparent transmission mode.
The modem event report mode is classified into the delay mode, direct mode, and high-speed signal immediate mode.
  • In the delay mode, the MA5600T/MA5603T/MA5608T does not report the modem event immediately after receiving an event. Instead, it waits for a period of time until the event times out and no V21flag event is reported. In this manner, when the high-speed fax machines fail in the high-speed transmission (the modem mode on the host) negotiation, the low-speed transmission mode (the fax mode on the host) can still be used for transmitting data.
  • In the direct mode, the MA5600T/MA5603T/MA5608T reports the modem event to the MGC immediately after receiving the event from the drive. To enable the MGC to quickly respond to a modem event, configure the modem event report mode to the direct mode.
  • In the high-speed signal immediate mode, the MA5600T/MA5603T/MA5608T reports low-speed modem signals after a delay of 5.5s and reports high-speed modem signals without delay.

The configuration of the MoIP service is mainly the configuration of the modem event report mode and the transmission mode. The default settings are direct mode and transparent transmission mode. If configuration is required, you only need to configure the event report mode. This is because currently the MA5600T/MA5603T/MA5608T supports the modem service only in the transparent transmission mode. Hence, you do not need to configure the transmission mode.


  • Configure the H.248/MGCP-based modem event report mode.

    In the global config mode, run the modem parameters eventmode command to configure the modem event report mode. By default, the direct mode is used.

  • Configure the SIP-based modem event report mode.
    1. Run the interface sip command to enter the SIP interface mode.
    2. (Optional) Run the modem parameters transmode command to configure the modem event report mode.


To enable the MA5600T/MA5603T/MA5608T to communicate with the MGC through H.248, and configure the transmission mode of the modem to transparent transmission and the modem event report mode to delay mode, do as follows:

huawei(config)#modem parameters eventmode 0
Updated: 2019-02-22

Document ID: EDOC1100067358

Views: 16380

Downloads: 170

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