Import 16 Port Gsm Modem With Sim Card Rotation — Buy in wholesale FOB from Supplier in China

The Etross Telecom ETS-1664 is a 16-port GSM modem pool designed for bulk SMS operations, housing 64 SIM card slots (four per port) in a single industrial chassis. It uses a Quectel M35 module with quad-band support for 900, 1800, 850, and 1900 MHz frequencies, connects to a host computer via USB, and is controlled by AT commands (GSM 07.07 and 07.05). The device can send and receive SMS in bulk across all 16 channels simultaneously, with a data transmission rate of up to 14,400 bits/s and a baud rate of 115,200 bits/s.

A key function is automatic SIM card rotation, where the modem cycles through the four SIMs in each port according to rules preset via a PC terminal. This is intended to reduce the risk of individual SIM cards being blocked by network operators during high-volume messaging campaigns. The IMEI for each channel is also changeable through the same AT command interface, and each port has a separate power switch, allowing individual channels to be powered down or physically removed for maintenance without taking the entire unit offline.

This type of equipment is typically sourced by businesses running large-scale SMS marketing, notification systems, or two-factor authentication services, such as marketing agencies, logistics companies, and large retail chains. The unit operates on a 12V 3A adapter, weighs 5 kg, and supports Windows XP, Windows 7, Linux, and Unix operating systems. Prospective buyers should confirm the exact MOQ, current pricing, and lead time directly with Etross Telecom, as well as the specific SIM card format supported (standard, micro, or nano).

Etross Telecom Co., Ltd. is a supplier based in Shenzhen, Guangdong, China, operating from the address listed on its product profile. The company is listed with a 'harbor' trust tier on the platform, which indicates a basic level of supplier verification. Its profile shows a 0% response rate and an average response time of 0 hours, meaning prospective buyers should be prepared for potentially slower initial communication and may need to follow up.

The listing focuses on GSM modem pool solutions, specifically the ETS-1664 model with SIM rotation capability. The product description provides detailed technical specifications and installation steps, suggesting a focus on this specific product category. The profile does not provide information about the company's history, number of employees, production capacity, or specific export certifications, so buyers should request these details directly during their sourcing inquiry to assess the supplier's scale and compliance.