Grandstream IP PBX Audio Only User Voice System, Supports Up To 1500 Users and Up To 200 Concurrent Calls, Built-in Instant Messaging, Audio Conferencing, Compatible With GDMS | UCM6304A
Grandstream IP PBX Audio Only User Voice System, Supports Up To 1500 Users and Up To 200 Concurrent Calls, Built-in Instant Messaging, Audio Conferencing, Compatible With GDMS | UCM6304A