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  1. SIP / Multicast Talk-Back Ceiling Speaker - Viking Electronics, Inc.

  2. PROCOMM JBCSP3 Noise CANCELING CB Speaker with Talk Back

  3. Viking 40TB-IP SIP Multicast Talkback Speaker

  4. 011394 SIP Speaker with Talk-Back - CyberData Corporation

  5. Cobra HG S500 Highgear CB Speaker, One Color, One Size

  6. CB Radio Speakers | CB External & PA Speakers - Walcott Radio

  7. Talkback Wall Speaker, Black, for ACS, VC-1061-BK – Valcom

  8. Grandstream Networks GSC3516 Sip/multicast Talk-back Speaker 15w Speaker

  9. Talkback Speakers | Network Square Speakers | SIP Speaker

  10. Valcom V-1060A 8-in Talkback Round Ceiling Speaker - IP Phone Warehouse