3.1 The modem is to be used for AMI at meter installations with the following conditions:- a. modem shall be enclosed inside meter terminal cover or inside meter. b. modem shall be modular or attached, removable or replaceable in order to be compatible with future cellular technologies c. modem shall be powered up and operated with DC voltage obtained from each TTL serial or RS232 serial meter communication port.d. Modem may also be powered up via external supply via USB port for configuration or maintenance purposes. e. modem shall be capable of operating satisfactorily under tropical condition with ambient temperature (Up to 55 degree) and relative humidity between 45% and 95% in compliance with MS Standard. f. modem shall have been type tested in accordance with the standards adopted by Malaysian Commission of Multimedia and Communication (MCMC) for usage in Malaysia.