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Electronic Hook Switch Compatibility Table for Polycom SoundPoint IP, Polycom VVX, Cisco IP, Nortel IP, Yealink IP, NEC Digital, and IP Softphones




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, 601, 600, 601, 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