Headsets for the Cisco Unified IP Phone 7900 Series Now That Cisco Support Has Ended

Cisco Unified IP Phone 7900 Series support in 2026, and what it means for headsets

Most people arriving at this question have a wall of these phones and one budget line for headsets. The useful split is not new versus old. It is which of your 7900 models can do remote answering and which can only do audio, because that decision changes the price of every seat by the cost of a wireless base and an EHS cable.

Cisco stopped selling the 7900 series in 2018 and the accessory list froze with it

June 18, 2018 was the last day to order a Cisco Unified IP Phone 7945, 7965 or 7975, and Cisco's notice for those models ended firmware support for all 7900 series endpoints, the older ones in the family included.

For a headset buyer that frozen date is the one good thing about the situation. Nothing about the phone is going to change under you. The cable that worked on a 7962G in 2018 is the same cable that works on it now, and the only movement has been on the label: the Plantronics U10 became HP part 85R38AA when HP absorbed the Poly catalog, with the old 26716-01 number still printed alongside it. If a supplier quotes you one number and your existing stock has the other, you are looking at the same cable.

A corded headset works through the headset port, and the cable is what people get wrong

Every 7900 with an RJ-9 headset port takes a corded quick disconnect headset through a U10 adapter cable, and the version you need is the one with the clear RJ9 plug.

This is worth slowing down on, because two cables in the Plantronics range are physically identical apart from a tint. The U10 for Cisco has no code embossed on the quick disconnect plug, a small plug, and a clear RJ9 modular connector. The Polaris U10P looks the same in the hand and has a smoke-colored RJ9 plug, and it is built for Polycom and VVX phones. Order by picture and you have a fifty-fifty chance on a mixed-estate order. Order by the tint and you get it right every time.

The quick disconnect end is the reason this generation is cheap to run. The headset detaches at the plug, so when a boom arm snaps or a cushion goes hard, you replace the headset top and keep the cable, and the phone never comes into it. On a floor of 7960s that has already outlived two headset refreshes, the cables in the drawer are usually still good.

Remote answering stops at the five G-suffix models

Poly's APC-43 lists Cisco 7942G, 7945G, 7962G, 7965G and 7975G from the 7900 family, and the Jabra Link 43 and Link 22 cover the same set, which means those five are the only 7900 phones with a documented remote answering path.

EHS: Electronic hookswitch: a cable that lets a wireless headset pick up and hang up calls on the desk phone from across the room, so the user never touches the phone to take a call.

The gap between the models is easy to miss because the wireless headset itself does not care. A Savi or an Engage will happily sit on a 7940 and carry audio through the headset port. What it cannot do there is ring in your ear or answer when you tap the earcup, because no EHS cable is published for that phone. Buyers find this out after the base stations arrive, which is the expensive order in which to find it out.

On the Jabra side there is a second fork. The Link 43 was built for the older Jabra Pro headsets and needs IQ mode switched on at the headset, while the Link 22 needs no headset setting at all but only works with the headsets Jabra describes as the 9400 series. Same phone list, different headset generations, and the part number that shipped with a colleague's desk five years ago is not automatically the one your current headset wants.

Two things stop a correctly ordered EHS cable from working

The first is a setting on the phone record, not on the headset: the phone must have Wireless Headset Hookswitch Control set to Enabled, under Device Configuration and Media Configuration in Unified CM, and then be reset before it takes effect.

The version floor sits underneath that. The APC-43 documentation calls for CallManager 4.1(3)SR5x or higher and phone firmware 8.3(3)x or higher, which almost any surviving 7900 estate clears, but it is the first thing to check on a phone that has been sitting on a spare desk unpatched for a decade.

The second is physical, and it catches people with the busiest desks. If the phone has a 7914, 7915 or 7916 expansion module hanging off it, the APC-43 goes into the AUX connector on the module rather than the one on the phone. The cable reaches, the plug fits, and it simply does not answer calls if you put it in the wrong one. Supervisors and receptionists are exactly the seats that get expansion modules and exactly the seats that get wireless headsets, so this collides more often than the install rate would suggest.

Which 7900 model does what

The three columns below split the generation the way it actually splits: corded audio is near universal, remote answering is not, and Unified CM 14 draws a third line that does not match either of the first two.

Read the middle column first if you are budgeting. A seat in row one can be quoted a wireless headset and an EHS cable and it will behave the way the sales page promises. A seat in row two should be quoted corded, or quoted a new phone.

When the phone, not the headset, is the thing to replace

Cisco's deprecated list for Unified Communications Manager 14 names the 7906G, 7911G, 7925, 7926, 7931, 7936, 7937G, 7940, 7941, 7960, 7961 and 7985, and registration for those models is blocked once the upgrade happens, so they stop working on the call server rather than merely losing support.

That is the moment to stop spending on the desk. If a floor of 7940s is going to fall off the call server at the next Unified CM upgrade, a wireless base station bought for those desks has a short life ahead of it, and a corded headset with a quick disconnect cable does not: the headset top moves to the replacement phone and only the adapter cable changes. The 7942G and 7965G class of phone is in the opposite position, still registering and still able to remote answer, and worth the full wireless setup.

Whichever way that lands, the headset side is the easy half. Our range of cisco phone headsets covers the corded quick disconnect models that work across the 7900 generation and the wireless sets that pair with an EHS cable on the five models that support one.