— Portsmouth FC (@officialpompey) June 24, 2014
Dunne, a 24-year old midfielder, joins Pompey on a two-year deal with an option to a further extension in the future having impressed on loan at SPFL side St Johnstone.
Poke, a 28-year old goalkeeper, has joined the club on a two-year deal following his release from recently relegated League Two side Torquay United.
Portsmouth manager Andy Awford told the club website, “James is a player that I’ve admired for the last 18 months and enjoyed a very successful spell in Scotland last season.
“I’ve watched him play on a few occasions and am delighted that he’s agreed to join us – especially as there were clubs from higher leagues interested in him.