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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).
Configuring the SIP-based FoIP Service

Configuring the SIP-based FoIP Service

This topic describes how to configure the SIP-based FoIP service.

Prerequisites

  • The SIP-based VoIP service must be configured. For details, see Configuring the VoIP PSTN Service (SIP-based).
  • The voice service port used for the FoIP service must be in the normal state, and the voice communication on the port must be normal.

Context

According to the fax coding mode, the FoIP service is classified into two modes:
  • Transparent transmission fax: uses the G.711 coding
  • T.38 fax: uses the T.38 coding
In the fax service application, according to whether the SIP signaling is involved in controlling the transmission, the FoIP service is classified into two modes:
  • Negotiate mode, in which the SIP signaling is involved in controlling the transmission
  • Self-switch mode, in which the SIP signaling is not involved in controlling the transmission

Data preparation

Before the data configuration, it is recommended that you plan the working mode of the FoIP service on the entire IMS network to ensure that the configurations on the entire network are consistent.

Table 1-53 Fax flows

Item

Flow

Remarks

Coding negotiation mode

Negotiate

The gateway negotiates the coding mode with the IMS through SIP signaling.

Self-switch

The gateway determines the coding mode to be adopted.

Coding mode

Transparent transmission fax

The G.711 coding mode is adopted.

T.38 flow

The T.38 coding mode is adopted.

Default Configuration

Table 1-54 lists the default settings of the FoIP flow.

Table 1-54 Default settings of the FoIP flow

Item

Default Setting

Coding negotiation mode

negotiate

Transmission mode

1: thoroughly

Packetization interval

1: 10ms

Codec mode of VBD

G.711A

Payload type of VBD

static

Attribute type of VBD

V.152

Procedure

  1. Configure the common parameters of fax and modem.
    1. In the global config mode, run the interface sip command to enter the SIP interface mode.
    2. In the SIP interface mode, run the fax-modem parameters command to configure the coding negotiation mode.

      The purpose of this step is to configure the coding negotiation mode. Key parameter negomode: includes the self-switch mode and the negotiate mode. By default, the negotiate mode is adopted.

  2. Configure the fax coding mode.

    In the SIP interface mode, run the fax parameters command to configure the fax transmission mode. There is only one key parameter, which is described as follows:

    transmode: The value 0 indicates the transparent transmission mode with the G.711 coding; the value 1 indicates the T.38 mode, which is a coding mode dedicated to the fax service. By default, the value 0 is adopted.

  3. Query the common parameters of the fax and modem or the fax parameter configuration.
    1. Run the display fax-modem parameters command to query the fax negotiation flow.
    2. Run the display fax parameters command to query the fax coding mode.

Example

To configure the negotiation mode of the FoIP service on the SIP interface 0 to negotiate, use 20 ms packetization, configure the codec mode of VBD to G.711A, payload type of VBD to static, configure the attribute type of VBD to ietf, and the fax transmission mode to thoroughly, do as follows:

huawei(config-if-sip-0)#fax-modem parameters negomode negotiate rtp-interval 2 vbd-codec G.711
A vbd-pt-type static vbd-attribute-type ietf
huawei(config-if-sip-0)#fax parameters transmode 0
huawei(config-if-sip-0)#display fax-modem parameters                            
 -------------------------------------------------------------------------------
 MGID                      :0                                                      
 Nego-mode                 :negotiate
 Rtp-interval              :20ms
 Vbd-codec                 :G.711A
 Vbd-pt-type               :static
 Vbd-attribute-type        :ietf
                                             
 -------------------------------------------------------------------------------
                                                                                
huawei(config-if-sip-0)#display fax parameters                                  
 ---------------------------------------                                        
 MGID      Transmode                                                            
 ---------------------------------------                                        
 0         Thoroughly                                                           
 ---------------------------------------                                        
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Updated: 2019-02-22

Document ID: EDOC1100067358

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