- Houston, Texas, United States
- Jun 8th
This listing is for: Device was removed during a system upgrade and was working prefectly prior to the upgrade. A GSM cellular option for CB 1-s, CB 1-d, CB 1-w and CB 4-u models for areas where phone lines are not available or trenching costs are prohibitive. It connects to a PBX trunk line, PBX extension line or a single PSTN line and routes incoming and outgoing calls through a GSM wireless network.