SIP / Multicast Talk-Back Ceiling Speaker - Viking Electronics, Inc.
011394 SIP Speaker with Talk-Back - CyberData Corporation
PROCOMM JBCSP3 Noise CANCELING CB Speaker with Talk Back
IPX Series IP-8SM Indoor Wall/Ceiling Mount IP Speaker - AtlasIED
Speakers – Valcom
Talkback Wall Speaker, Black, for ACS, VC-1061-BK – Valcom
IP Round Ceiling, 8-Inch, Talkback, White, VIP-160A – Valcom
Cobra HG S500 Highgear CB Speaker, One Color, One Size
Viking 40TB-IP SIP Multicast Talkback Speaker
Valcom V-1060A 8-in Talkback Round Ceiling Speaker - IP Phone Warehouse