Very true. However, the NT describes them having some different roles (Eph. 5, 1 Tim 3), and while some women in the NT are portrayed as having important spiritual roles (Philip's daughters, for one example), the initial deacons chosen (Acts 6) were all male, and I can't recall any NT women as holding that specific office.
Concerning the roles of deacons and elders, the only obvious difference in the 1 Tim 3 qualifications list is that elders (bishops) be "apt to teach." Another might be that bishop is singular in that passage while deacons are plural, though I believe that a NT church has liberty to appoint to each office as the Lord leads.
Some translations: Romans 16:1
New International Version
I commend to you our sister Phoebe, a deacon of the church in Cenchreae.
International Standard Version
Now I commend to you our sister Phoebe, a deaconess in the church at Cenchrea.
GOD'S WORD® Translation
With this letter I'm introducing Phoebe to you. She is our sister in the Christian faith and a deacon of the church in the city of Cenchrea.
Douay-Rheims Bible
AND I commend to you Phebe, our sister, who is in the ministry of the church, that is in Cenchrae:
Most translation go with "servant." Here is one lexicon's view:
a servant
διάκονον (diakonon)
Noun - Accusative Feminine Singular
Strong's Greek 1249: Probably from an obsolete diako; an attendant, i.e. a waiter; specially, a Christian teacher and pastor.