Staff can subscribe the SMS Gateway on behalf of their departments to send SMS to a group of staff and / or students. This service allows makes sending SMS manageable with a web interface. See more from the service homepage listed below.
$ 0.8/ SMS & after 1875th SMS, $ 0.6/ SMS;
SMS Gateway Service https://sms-gateway.itsc.cuhk.edu.hk/ (via Campus Network or CUHK / SSL VPN)
24 X 7; subject to the availability and capacrity of telecom service providers