ACU (Audio Communication Unit)
Audio interface cards available for UCP1600/2120/4131 series chassis; the ACU module provides 2 pairs of audio ports.
Products
Every OpenVox product line, from PBX systems to gateways and accessories.
View all 184 productsIPPBX and phones
Cards and accessories
Connect my sites
Modernize what I have

Unified Communications Platform
GSM interface cards for UCP1600/2120/4131 series chassis; the WTU-GSM module provides 4 GSM ports.
The OpenVox WTU-GSM wireless gateway module enables OpenVox UCP1600/2120/4131 to support GSM connections to VoIP devices, with each module providing 4 GSM channels.
The WTU-GSM series wireless gateway modules provide excellent HD voice service with multiple codecs, including G.711U, G.711A, GSM, G.722, G.726, and G.729, as well as flexible SMS service with multiple SMS APIs. The WTU-GSM wireless gateway module is 100 % compatible with Asterisk, 3CX, FreePBX, FreeSWITCH, and the VOS VoIP platform, giving users more diverse telecom access methods and helping them reduce communication costs.
Technical Specifications:
Frequency range: GSM 850/900/1800/1900 MHz
Storage temperature range: -40~125℃
Operating temperature range: 0~50℃
Operating humidity range: 10 %~90 % non-condensing
Maximum power consumption: 28 W
Dimensions: 12.4 cm × 18.5 cm × 2.1 cm
Weight: 164 g
Warranty: One year
See the manufacturer description and linked documentation for product information. No specification table is published on the captured product webpage.
Request a quote: our team will confirm availability, compatibility and a deployment plan.