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Telephone Model EHS cord for CS50, CS,55, CS70, CS70N, CS351N, CS361N EHS cord for Savi and CS500 Series (CS510, CS520, CS540)
Polycom SoundPoint IP
320/321, 330/331, 335, 430, 450, 550, 560, 650, 670 APP-5 APP-51
Polycom VVX
VVX 300, 310, 400, 401, 410, 411, 500, 600, 1500 APP-5 APP-51
Cisco SPA500 Series  
SPA512, SPA514, SPA525G2 N/A APC-45
Cisco 6900 Series  
6945 N/A APC-43
Cisco 7800 Series    
7821, 7841, 7861 N/A APC-43
Cisco 7900 Series
7942G, 7945G, 7962G, 7965G, 7975G APC-4 APC-43
Cisco 8800 Series  
8811, 8841, 8851, 8861 N/A APC-43
Cisco 8900 Series
8941, 8945, 8945G, 8965, 8965G N/A APC-82
8961 N/A APC-72
Cisco 9900 Series
9951, 9971 N/A APC-72
Nortel 1100 Series  
1120E, 1140E, 1150E, 1165E APU-7 APC-72
Yealink IP Phones
Yealink SIP-T27P, T29G, T40P, T41P, T42G, T46G, and T48G N/A EHS36
IP Softphones  
IP Softphone for PC, Microsoft Skype for Business, etc. N/A APU-75
NEC Digital Phones
NEC DSX 34B BL, DSX 34B FDX, DTR Series (DTR 8, DTR 8D, DTR 16D, DTR 16LD, DTR 32D) , DTH Series (DTH 8, DTH 8D, DTH 16D, DTH 16LD, DTH 32D), DTL series (DTL 12D, DTL 24D, DTL 8LD, DTL 32D), DT 330, DT 730 and DT 750 N/A APN-91


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