Etherstack (ASX:ESK) said it expects to recognize within the next two years the majority of the revenue from a five-year contract worth 14.2 million pounds sterling to supply mission-critical communications software for use in the UK's Emergency Services Network, according to a Tuesday filing with the Australian bourse.

The remaining will be spread over the next three years, the filing said.

Shares of the company rose 6% in recent Tuesday trade and earlier hit their highest since August 2020.