How to delete a SIP trunk on the U1900 series unified gateway

Method of configuring the AT0 trunk for the U1900 series unified gateway: Log in to the official website of Huawei enterprise technical support and refer to the eSpace U1900 V200R003C00 AT0 Special Configuration Tasks for detailed configurations.

1. If you use the CLI, run the following command to configure the clock source: config system clocksource primaryslot 3 primarye1 0 Parameter description: primaryslot: indicates the slot number of the DTU/MTU board connected to the trunk line through which the clock source is synchronized to the peer device. primarye1: indicates the E1 port connected to the trunk line through which the clock source is synchronized to the peer device. 2. For V100R001C20 and V200R003, you can configure the clock source using the web management system. (1) Choose System > Clock Source Configuration. (2) Select Peer device from the Select clock source drop-down list box. (3) Click Data Save in the upper right corner of the web management page. Note: If the local device provides the clock source, you do not need to configure the clock source. If the peer device provides the clock source, you need to configure it. A clock source allows the time of the U1900 to be synchronized from the upper-level device (that is, the peer device). This prevents frame slip (voice packet loss). If the U1900 connects to multiple devices through E1/T1 trunks, configure the clock source on any of these devices. The U1900 will synchronize time with this device. If the U1900 provides the clock source, you do not need to configure the clock source.

Run the config cdsp rfc2833 switch on command in config mode to enable RFC 2833.

config delete sipue eid 2560 //Delete the device whose ID is 2560 for a single SIP user. config delete batch sipue //Delete SIP devices (including SIP soft clients, SIP hard terminals, and analog phones connected to SIP IADs) in batches. Command format: config delete batch sipue seid seid [step step] [number number] config delete batch sipue seid seid localgwid localgwid (U1911|U1960|U1980|U1981) Parameter description: seid: indicates the device ID, which is equivalent to the registration account number of a SIP device, such as the SIP user ID configured during IP phone registration. step: indicates the step between two consecutive device IDs. number: indicates the number of devices to delete in a batch. For example, if seid is set to 7000, step is set to 2, and number is set to 3, the following devices are added: 7000, 7002, and 7004. localgwid: indicates the local gateway ID configured in the distributed network. The value is an integer and ranges from 0 to 19 for U1911, 0 to 199 for U1960, 0 to 299 for U1980, and 0 to 1023 for U1981. Remarks: Before deleting SIP devices, delete corresponding SIP users.

All U1900 series unified gateways support SIP/SS7/PRA/R2/QSIG Trunk. U1910/U1911/U1930/U1960/U1981 also support AT0 Trunk, U1980 doesn't support AT0 Trunk. U1911/U1960/U1981 support BRI Trunk, while U910/U1930/U1980 doesn't support BRI.