IDM DTWF-2 Elevator Five-party Intercom IP Gateway
IDM DTWF
When there is no fiber connection between the central monitoring room and the elevator machine room, but an IP connection channel is available, a mode similar to VoIP telephony can be used, but without requiring a SIP server, instead using end-to-end IP hotline connection. In this case, the IDM DTWF-2 Elevator Five-party Intercom Gateway can be used. If it is not an IP private network, VPN virtual private network technology must be provided. The IDM DTWF-2 provides conversion of 2 elevator intercom interfaces to the IP transmission network.
Overview
With the expansion of modern residential communities, the distance between the central monitoring room host duty room and the elevator machine room may exceed the transmission distance of the five-party intercom twisted pair. Therefore, the communication mode between the central office and the elevator machine room has also undergone various changes. One approach is to use GSM transmission, but this method is subject to GSM charging models and is not economically reasonable.
Beijing Ruiguang Jiyuan provides two solutions based on fiber optics and IP communication networks to meet user requirements in different scenarios.

IP Audio Transmission Solution
When there is no fiber connection between the central monitoring room and the elevator machine room, but an IP connection channel is available, a mode similar to VoIP telephony can be used, but without requiring a SIP server, instead using end-to-end IP hotline connection. In this case, the IDM DTWF-2 Elevator Five-party Intercom Gateway can be used. If it is not an IP private network, VPN virtual private network technology must be provided.
The IDM DTWF-2 provides conversion of 2 elevator intercom interfaces to the IP transmission network.

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