From a Northrop Grumman website:
Ordinarily, the Social Security Administration’s (SSA) headquarters and its more than 1,200 field offices across the country, are visited daily by thousands of citizens either in person, or by phone, seeking assistance with supplemental income and health and disability insurance. ...
Four years ago, a Northrop Grumman team began working with the SSA on a project to allow field office workers the opportunity to telework one or two days per week using a softphone, or having access to their phone lines through their computers. ...
The project had rolled out to nearly half of the field office workforce, about 28,000 employees, however policy changes at the SSA had slowed down any further expansion.
That changed with the rapid spread of COVID-19.
With SSA facilities closing in response to the coronavirus pandemic, there was suddenly an immediate need for all 50,000+ SSA field office employees to have softphone access.
During a marathon multiday session beginning March 13, a team of 16 Northrop Grumman employees who support the SSA on the Information Technology Support Services Contract (ITSSC2), sorted through databases to identify the SSA employees who were not set up with softphones. More than 30,000 names were identified and given to the SSA’s Division of Integrated Telecommunications Management (DITM). Plans were immediately put in place to accelerate the softphone rollout. ...
Within five days, the project to identify names and provide softphone access was complete. ...What I've wondered about is how they came up with all the hardware so quickly. I'm pretty sure the "softphones" require hardware.