About 40 workers are to lose their jobs when Cisco closes its UK-based Technical Assistance Centre (TAC) this summer to transfer the workload overseas.
Cisco outsources telephone support and remote fixes to Milton Keynes-based Getronics, where Cisco-accredited support engineers deal with technical issues for resellers and end-users.
Sources said Getronics engineers were told late in January that the unit would be closed in stages and shut down completely in July.
"Cisco is taking its services offshore and unfortunately Getronics engineers are involved in the redundancies," a spokeswoman at Getronics confirmed to vnunet.com.
Cisco would not say where the TAC will be relocated, but one possible location is Brussels.
However, others believe the work could be moved to Mexico and the Philippines, after Getronics was massively undercut by a competitor. "Getronics charges $120 [£76] per case closure but Cisco has been offered $20," said a source.
Cisco would not comment on the potential cost savings.
Keith Humphreys, analyst at EuroLAN Research, said a move to Brussels would be more logical. He questioned how Cisco would maintain its "follow the sun" support capacity if it moved the resources out of Europe.
With support centres in Europe and Australia Cisco does not suffer from time difference and is able to deal with calls 24 hours a day.
"When resellers or customers call the TAC they are dealt with straight away, so if it moves support out of Europe how will Cisco do it?" Humphreys said.
Microsoft seizes control of phishing sites linked with Russian state hackers
Fitness trackers over-estimate the number of steps their users take, analysis of 67 research reports suggests
Everything we think we know about the imminent Apple iPhone 9, iPhone 11 and iPhone 11 Plus launches
All the latest rumours about Apple iPhone Displays, CPUs, launch dates and even prices
Nvidia brings Turing microarchitecture into the high-end gaming segment