You may request service and support from PSST by:
1.Contacting your installer, if it is VoIP emergency telephone, PSST partner can help you upgrade the firmware, GSM/CDMA/Analog can provide spare parts replacement.
2.Find information on our webpage, including manual, installation instructions
3. Requesting technical support via email(WWUU02@126.COM) or telephone(+86-0755-89487736). our technical support staff are available to respond to your questions via email or telephone.
4. To our Shenzhen headquarters, access to direct technical support