OpenVox Launches SWG-4016/32 eSIM Wireless Gateways for Scalable Cellular-to-VoIP Integration

Shenzhen, China – December 19, 2025 – OpenVox Communication Co., Ltd., a global leader in open-source VoIP gateways and unified communication solutions, today announced the official launch of the SWG-4016E/4032E eSIM Series Wireless Gateways, setting a new benchmark for scalable, flexible, and future-ready GSM/WCDMA/LTE-to-VoIP connectivity.

SWG-4016E/4032E Series Wireless Gateway which can be compatible with 4G module, enabling interconnection between GSM/WCDMA/LTE network and VoIP network safely and efficiently. They can bring you excellent HD voice service with multiple codecs, including G.711U, G.711A, GSM, G.722, G.726, G.729. 

ESIM series gateway support eSIM or physical SIM. There are two models with the eSIM series gateway. The SWG-4016E Wireless Gateway can provide 16 physical SIM cards or 128 eSIMs. The SWG-4032E Wireless Gateway can provide up to 32 physical SIM cards or 256 eSIMs. Physical SIM and eSIM can be switched on web. In eSIM mode, one channel can store 8 eSIMs’ information and 8 eSIMs per port to work by strategy. In SIM mode, one channel can be inserted one SIM card.

With the unique design of the SWG-4016E/4032E Wireless Gateway, it can support hot-swap for SIM cards. The SWG-4016E/4032E series gateways is perfect compatible with Asterisk, Issabel, 3CX, FreeSWITCH and VOS VoIP system platform. It can provides users with more diverse telecommunications access methods and helps users reduce communication costs.

Please check the following form for all the models:

Model	Module Type	Physical SIM Ports	eSIM Ports
SWG-4016E	GSM、WCDMA、LTE	16	128
SWG-4032E	GSM、WCDMA、LTE	32	256

The SWG-4016E/32E eSIM Series Wireless Gateway are now available worldwide through OpenVox’s global distribution and partner network. For more information about the products, please visit this page.

To request a quote, demo, or technical consultation, contact OpenVox sales at sales@openvoxtech.com, or reach out to your local authorized partner. We look forward to your inquiry!