Poly Plantronics connection cable U10 P-S19 designed for Mitel 5370, 5370ip, 5380, 5380ip, 6775, 7434ip, 7444ip ¦ Mitel MiVoice 5380 IP Phone, 6771, 6773, 6773 IP, 6775, 6775 IP ¦ Plantronics DuoPro H151, H151N, H161, H161N, H171, H171N, H181, H181N ¦ Plantronics DuoSet H141, H141N ¦ Plantronics Encore H101, H101N, H91, H91N ¦ Plantronics Entera USB HW111N-USB, HW111N-USB-M, HW121N-USB, HW121N-USB-M ¦ Plantronics Mirage H41, H41N ¦ Plantronics SupraPlus SL H351 with VoiceTube, H351N, H351N with Noise Canceling, H361 with VoiceTube, H361N with Noise Canceling ¦ Plantronics TriStar H81, H81N ¦ Poly EncorePro HW291N, HW301N ¦ Poly SupraPlus H251, H251 with Voice Tube, H251N, H261, H261N