How to configure the AT0 trunk for the U1900 series unified gateway
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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.
You can delete a SIP trunk on the U1900 using the CLI or web management system.
1. Run the config protocol sip disable command in the config mode.
2. Log in to the web management system of the U1900. Choose Trunk > Trunk Configuration > SIP, select a SIP trunk, and click Delete.
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.
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