Connecting your Sennheiser Headset

Aastra - IP Phones - 53i VoIP, 55i VoIP, 57i VoIP, 480i VoIP, 9112i VoIP, 9133i VoIP: CSTD 01 Standard lead
Alcatel - 4001, 4003, 4004 (Alcatel First), 4010 (Alcatel Easy), 4011, 4012, 4018 IP, 4019, 4020 (Alcatel Premium) and 4035 (Advanced) - CSTD 01 Standard lead* or UI740 Amplifier
Alcatel - Alcatal 8 Series Ip-Touch - 4028 IP, 4038 IP, 4068 IP - CCEL193 3.5mm Connection lead
Alcatel - Alcatal 9 Series Digital - 4029, 4039 - CCEL193 3.5mm Connection lead
ATL - Berkshire: 200, 400, 600, 800 and IP5000 - CLS 01 lead
Avaya/Lucent - Index: 2010 - UI740 Amplifier
Avaya/Lucent - Index: 2030, 2050, 2060, DT1, DT3, DT4, DT5, DT6, TT3 & TT5 - CSTD 01 Standard lead* or UI740 Amplifier
Avaya - Definity: Definity 6402D, Definity 6408D+, Definity 6416D+, Definity 6416D+M, Definity 6424D+, Definity 6424D+M, Definity 8410D, Definity 8434DX - CSTD 01 Standard lead
Avaya - Callmaster - Definity Callmaster II - UI740 Amplifier
Avaya - Callmaster - Definity Callmaster III, Definity Callmaster IV - CSHS 01 Connection lead
Avaya - Callmaster - Definity Callmaster V, Definity Callmaster VI - CSTD 08 Connection lead* or UI740 Amplifier
Avaya - Digital 2400 series: 2402, 2410, 2420 - CLS 01 lead
Avaya - IP 4600 series: 4601, 4602, 4606, 4610, 4612, 4610SW, 4620, 4621SW, 4622SW, 4624, 4625, 4630 - CSTD 01 Standard lead
Avaya - IP 4600 series: 4606, 4612, 4624 - HIP Connection Lead
Avaya - 5400 Digital series: 5402, 5410, 5420 - CSTD 01 Standard lead
Avaya - IP 5600 series: 5620 - CSTD 01 Standard lead
Avaya - IP 6200 series: 6201, 6210, 6220 - CSTD 01 Standard lead
Avaya - IP 9600 series: 9610, 9620, 9630, 9640, 9650 - CSTD 24 Connection lead
BT - Converse: Converse 125 - UI740 Amplifier
BT - Converse: Converse 1100, Converse 225, Converse 1200, Converse 325, Converse 1300, Converse 425 & Converse 1400 - CSTD 01 Standard lead
BT - Featureline: BT Featureline Embark - UI740 Amplifier
BT - Featurenet: M6310 and M6320 - UI740 Amplifier
BT - Paragon: BT Paragon 450 and BT Paragon 650 - CSTD 01 Standard lead
BT - Versatility: Versatility V - UI740 Amplifier
BT - Versatility: Versatility V8 and Versatility V16 - CSTD 01 Standard lead
Cisco - 790X Series: CSTD 24 Connection lead
Cisco - 791X Series: CSTD 24 Connection lead
Cisco - 792X Series: CCEL191 2.5mm Connection lead
Cisco - 794X Series: Cisco 7940 & Cisco 7941- CSTD 08 Connection lead
Cisco - 796X Series: Cisco 7960 & Cisco 7961 - CSTD 08 Connection lead
Cisco - 797X Series: CSTD 08 Connection lead
Ericsson - DBC3201, DBC3202, DBC3203, DBC3210, DBC3211, DBC3212, DBC3213 and DBC3214, Dialog 4220 - CSTD 01 Standard lead* or UI740 Amplifier
Ericsson - Dialog 4222, Dialog 4223, Dialog 4224, Dialog 4225 - CSTD 01 Standard lead
GPT/Siemens - iSDX/Realitis: DT 40, DT 50, DT 60 & DT 70 - E10 Amplifier
Meridian Norstar - M7100, M7100N - UI740 Amplifier
Meridian Norstar - M7208, M7208N, M7310, M7310N, M7324, M7324N, T7208, T7316 - CSTD 01 Standard lead
Mitel - 5201, 5207: UI740 Amplifier
Mitel - Superset 4015, Superset 4025, Superset 4150, 5010, 5020, 5050, 5215, 5220, 5230 & 5240: CSTD 01 Standard lead
Nortel Meridian: M2616, M3110, M3901 - UI740 Amplifier
Nortel Meridian: M2216D, M3310, M3820, M3902, M3903, M3904, M3905 - CSTD 01 Standard lead
Nortel - Nortel 1100 Series IP Matrix: 1110E: UI740 Amplifier
Nortel - Nortel 1100 Series IP Matrix: 1120E, 1140E and 1150E: CSTD 01 Standard lead
Nortel - I2000 series: I2002, I2004 and I2007: CSTD 01 Standard lead
Panasonic - KX-NT IP series: KX-NT136, KX-NT343, KX-NT346 & KX-NT366 : CCEL191 2.5mm Connection lead
Panasonic - KX-T7000 series: KX-T 7020, KX-T 7050, KX-T 7130, KX-T 7310, KX-T 7315: UI740 Amplifier
Panasonic - KX-T7200 series: KX-T 7220, KX-T 7230, KX-T 7235, KX-T 7240, KX-T 7250: UI740 Amplifier
Panasonic - KX-T7400 series: KX-T 7420, KX-T 7425, KX-T 7431, KX-T 7433, KX-T 7436: UI740 Amplifier
Panasonic - KX-T7600 series Matrix: KX-T 7603, KX-T 7625, KX-T 7630, KX-T 7633, KX-T 7636 : CCEL191 2.5mm Connection lead
Panasonic - KX-T7600 series Matrix: KX-T 7665 : UI740 Amplifier
Panasonic - KX-T7700 series: KX-T 7730, KX-T 7735 : CCEL191 2.5mm Connection lead
Panasonic - KX-T7700 series: KX-T 7720, KX-T 7750: UI740 Amplifier
Panasonic - A-Series, DBS & SBS: UI740 Amplifier
Polycom - Soundpoint IP: SoundPoint IP301, SoundPoint IP430, SoundPoint IP650 - CSTD 01 Standard lead
Polycom - Soundpoint IP: SoundPoint IP300, SoundPoint IP400, SoundPoint IP500, SoundPoint IP600 - CSTD 24 Connection lead
Polycom - Soundpoint IP: SoundPoint IP320, SoundPoint IP330 - CCEL191 2.5mm Connection lead
Polycom - Soundpoint Pro - CCEL191 2.5mm Connection lead
Samsung: DCS 6 Key, DCS 12 Key, DCS 24 Key - CSTD 01 Standard lead* or UI740 Amplifier
Siemens - Hicom office (Optiset): Advance & Memory - Siemens Adaptor with an CSTD 01 Standard lead
Siemens - Hicom office (Optiset): Entry, Basic & Standard - UI740 Amplifier
Siemens - Optipoint 500 series: Advance, Basic, Entry or Standard - CLS 01 lead
Siemens - Realitis: CSTD 01 Standard lead
Standard Headset Telephones: CSTD 01 Standard lead
Toshiba - DKT: DKT2001, DKT2510, DKT2520, DKT2010, DKT2020, DKT3001, DKT3010S, DKT3014SD, DKT3020SD - UI740 Amplifier
Toshiba - DKT: DKT3512S, DKT3512SD, DKT3524S, DKT3524SD - CSTD 01 Standard lead
Toshiba - Strata DK: If the Toshiba phone is fitted with an HHEU2 card CSTD 01 Standard lead or UI740 Amplifier without the card.

* Headset plugs directly into the handset socket of your phone. Handset must be lifted out of it's cradle to answer calls, but can no longer be used to speak through as not connected to your phone. Using an Amplifer allows both handset and headset to be connected to your simultaneously, though the handset still needs to be lifted out of the cradle to answer a call.