What is the basis for configuring the maximum number of SIP trunk channels on the U1900?

The local device uses SIP to connect to the peer device through the SIP AT0 trunk over the IP network. PBX users can use SIP AT0 trunks to perform SIP calls or other applications through the IMS or softswitch. One SIP AT0 trunk can be used by only one user at a time. Incoming calls over the SIP AT0 trunk are forwarded to the local device or switchboard by default.

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A maximum of 32 cascading channels are supported by the VP9600 series MCU.

U1900 unified gateway model: U1910 U1911 U1930 U1960 U1980 U1981 Maximum number of trunk channels in each SIP trunk group corresponding to each U1900 model: 100 100 240 240 4000 4000 Maximum number of SIP trunk channels of each U1900 model: 100 100 300 1,000 20,000 20,000 For details about performance and capacity parameters, see Product Description > Technical Specifications > Performance and Capacity in the eSpace U1900 Series Unified Gateway Product Documentation.

The number of SIP trunk channels supported varies depending on the U1900 model. - U1910: 100 - U1911: 100 - U1930: 300 - U1960: 1000 - U1980: 20000 - U1981: 20000