Voice Intercom Development
About 4 min
Overview
This page is the English counterpart of the Chinese Voice Intercom Development guide. It summarizes secondary development, extension points, and integration implementation while keeping the document path aligned with the Chinese documentation structure.
How To Use This Page
- Follow the same operation order as the Chinese source page.
- Keep configuration values, topic names, ports, commands, and file paths consistent with your deployment environment.
- Screenshots and diagrams reuse the Chinese documentation image directory so assets are maintained in one place.
- For production changes, validate the operation in a test environment before applying it online.
Reference Commands And Configuration
The following snippets are preserved from the source guide because commands, configuration keys, and protocol examples should remain exact.
#平台侧------->设备侧
MESSAGE sip:34020000001110000001@3402000000 SIP/2.0
From: <sip:34020000002000000001@3402000000>;tag=bccedfd000006
To: <sip:34020000001110000001@3402000000>
Content-Length: 176
CSeq: 5 MESSAGE
Route: <sip:34020000001110000001>
Call-ID: 12345678900006
Via: SIP/2.0/UDP 192.168.1.101:5060;wlsscid=377aa9afcf1b36f;branch=123133532300006
Content-Type: Application/MANSCDP+xml
Max-Forwards: 70
<?xml version="1.0"?>
<Notify>
<CmdType>Broadcast</CmdType>
<SN>17298</SN>
<!--语音输入设备的设备编码-->
<SourceID>34020000002000000001</SourceID>
<!--语音输出设备的设备编码-->
<TargetID>34020000001370000001</TargetID>
</Notify>#设备侧------>平台侧
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.1.101:5060;wlsscid=377aa9afcf1b36f;branch=123133532300006
From: <sip:34020000002000000001@3402000000>;tag=bccedfd000006
To: <sip:34020000001110000001@3402000000>;tag=880670885
Call-ID: 12345678900006
CSeq: 5 MESSAGE
User-Agent: IP Camera
Content-Length: 0
#设备侧------>平台侧
INVITE sip:34020000002000000001@192.168.1.101:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.64:5060;rport;branch=z9hG4bK1490643408
From: <sip:34020000001110000001@192.168.1.64:5060>;tag=1499847265 //
To: <sip:34020000002000000001@192.168.1.101:5060>
Call-ID: 1420309512
CSeq: 20 INVITE
Contact: <sip:34020000001110000001@192.168.1.64:5060>
Content-Type: application/sdp
Max-Forwards: 70
User-Agent: IP Camera
# 媒体流发送者ID:发送方媒体流序列号,媒体流接收者ID:接收方媒体流序列号
Subject: 34020000002000000001:1,34020000001110000001:2
Content-Length: 214
v=0
o=34020000001110000001 2418 2418 IN IP4 192.168.1.64
s=Play
c=IN IP4 192.168.1.64
t=0 0
# 音频 端口 RTP-over-UDP 负载类型( 8-PCMA, 96-PS)
# 注意 这一步就是设备侧开的收语音流数据的端口
# RTP/AVP传输模式是udp，这种只能在局域网对讲
# TCP/RTP/AVP 这种才可以在公网对讲
m=audio 15062 RTP/AVP 8 96
a=recvonly
# RTP + 音频流: 负载类型
a=rtpmap:8 PCMA/8000
a=rtpmap:96 PS/90000
# SSRC(同步信源标识符): SSRC值由媒体流发送设备所在的SIP监控域产生,作为媒体流的标识使用
y=0200000017
# v/编码格式/分辨率/帧率/码率类型/码率大小 a/编码格式/码率大小/采样率
# G.711 / 64kbps / 8kHz
f=v/a/1/8/1#平台侧------->设备侧
》》》》》》 IPC
SIP/2.0 200 OK
From: <sip:34020000001110000001@192.168.1.64:5060>;tag=1499847265
To: <sip:34020000002000000001@192.168.1.101:5060>;tag=1420309512
Call-ID: 1420309512
CSeq: 20 INVITE
User-Agent: General SIP UAS V1.0
Via: SIP/2.0/UDP 192.168.1.64:5060;rport;branch=z9hG4bK1490643408
Contact: <sip:34020000002000000001@192.168.1.101:5060>
Content-Type: application/SDP
Content-Length: 182
v=0
o=34020000002000000001 0 0 IN IP4 192.168.1.101
s=Play
c=IN IP4 192.168.1.101
t=0 0
# 这是我们平台侧开的端口，使用这个端口发送音频数据到设备
m=audio 8000 RTP/AVP 8 // 端口：8000
a=rtpmap:8 PCMA/8000 //rtpmap:8 PCMA及g711a 采样率：8000HZ
a=sendonly
y=0200000017#设备侧------>平台侧
ACK sip:34020000002000000001@192.168.1.101:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.64:5060;rport;branch=z9hG4bK106578989
From: <sip:34020000001110000001@192.168.1.64:5060>;tag=1499847265
To: <sip:34020000002000000001@192.168.1.101:5060>;tag=1420309512
Call-ID: 1420309512
CSeq: 20 ACK
Contact: <sip:34020000001110000001@192.168.1.64:5060>
Max-Forwards: 70
User-Agent: IP Camera
Content-Length: 0
#这一步过后我们就可以发送音频数据了Shared Screenshots
The English documentation reuses the screenshots from the Chinese source page. UI labels in screenshots may remain Chinese.
