The Sennheiser Quick Disconnect Easy Connect Cord is a replacement cord for connecting your Sennheiser corded headset to the Sennheiser Corded Headset Amplifier. In addition, you can even usethis cord to connect your headset directly into specific Avaya, Cisco, Mitel, Nortel, Polycom, Siemens, and NEC phones (see models below)! Call us at1-800-HEADSETS (1-800-432-3738) to check for compatibility.

Compatible Avaya phone models:
4600 IP Series, 5600 IP Series, 6400 IP Series, 8400 IP Series, Merlin Magix 4400 Series

Compatible Mitel phone models:
5000, 5100, 5200, 5500 IP Series, as well as Superset 1, 2, 3, 4, 7, 410, 420, 430, 4000, 4100 Series

Compatible Nortel phone models:
i2001, i2002, i2004, M3901, M3902, M3903, M3904, M3905, M5006, M5009, M5112, M5209, M5212, M7100, M7208, M7310, M7324, M7900, T7100, T7208, T7316, T7324

Compatible Polycom phone models:
Soundpoint IP300, IP400, IP500, IP600, IP501, IP601 SIP, IP310, IP501, IP601, IP650

Compatible Siemens phone models:
312 Series, 612 Series, 624 Series, OptiPoint 400 IP Series

Compatible NEC phone models:
DTerm Series, and Electra Series ET-6, ET8, ET-16