Overview
The PBX supports three types of SIP trunk groups: SIP AT0, SIP PRA, and SIP IP. A SIP IP trunk group implements voice communication between PBX users and inter-office users.
SIP Overview
SIP is an application-layer signaling protocol that creates, modifies, and releases sessions of one or more parties.
Trunk Overview
A trunk is a logical link between two exchange offices. Inter-office calls must be transmitted by trunks. A trunk is bound to the signaling and media addresses of the local office and signaling address of the remote office so that a channel can be established between local and remote offices.
SIP Trunk Overview
A SIP trunk uses SIP to connect to the remote device through an Ethernet cable.
Unlike a circuit trunk that defines a physical channel, a SIP trunk defines a logical channel and solves authentication and addressing problems between local and remote offices.
Table Transport protocols that can be used by a SIP trunk describes transport protocols used by the SIP trunk.
Transport Protocol | Description |
UDP | Connectionless transport-layer protocol that provides event-based, simplified, and unreliable information transmission. When UDP is used to transmit data, each datagram is independent and contains the source and destination. Because UDP is unreliable, data may not reach the destination, and the time data reaches the destination and data integrity cannot be ensured. |
TCP | Connection-oriented protocol. Before data transmission, both ends must establish a virtual channel. |
The PBX at one end of a SIP IP trunk does not need to register with the device at the other end. When you configure a SIP IP trunk for a PBX, the remote end must support the SIP IP trunk, as shown in Figure Networking of SIP IP trunk groups.
Figure1 Networking of SIP IP trunk groups
Configuration Notes
Table Matching product models and versions describes the applicable product models and versions.
Device Vendor | Product Model | Version |
Huawei | AR1220 | Later versions of V100R005C20 |
Cisco | CUCM | - |
Networking Requirements
In Figure Connecting the AR1220 to the Cisco CUCM through a SIP trunk, the AR1220 connects to the phone of user 82000 and Cisco CUCM connects to the phone of user 80001. The AR1220 connects to the Cisco CUCM through a SIP trunk so that the user of the Cisco CUCM can make intra-office calls through the SIP trunk.
Figure1 Connecting the AR1220 to the Cisco CUCM through a SIP trunk
Data Plan
Before the configuration, plan data according to Table Data preparation for connecting the AR to the Cisco CUCM and Table Plan of the SIP IP trunk. The data in this document is used for reference only.
Device Vendor | Data |
Administrator user name and password of the AR | admin/huawei123 |
User connected to the AR | 82000 |
User connected to the Cisco CUCM | 80001 |
Signaling IP Address | Port Number | Media IP Address | Remote IP Address | Remote Port Number | Route |
10.1.1.2 | 5070 | 10.1.1.2 | 10.1.1.3 | 5060 | SIP |
