Then technically you were arrested. Your court date is an arraignment where you enter a plea. In your case it appears that you would want to enter a plea of not guilty and ask for a jury trial
. Here is the code
Va. Code Ann. § 18.2-429 (2009)
§ 18.2-429. Causing telephone to ring with intent to annoy
Any person who, with or without intent to communicate but with intent to annoy any other person, causes any telephone or digital pager, not his own, to ring or to otherwise signal, and any person who permits or condones the use of any telephone under his control for such purpose shall be guilty of a Class 3 misdemeanor
Any person who, with or without intent to converse, but with intent to annoy, harass, hinder or delay emergency personnel in the performance of their duties as such, causes a telephone to ring, which is owned or leased for the purpose of receiving emergency calls by a public or private entity providing fire, police or emergency medical service, and any person who knowingly permits the use of a telephone under his control for such purpose, shall be guilty of a Class 1 misdemeanor.
the penalty is a fine up to 500.00
My guess is that if you plead not guilty and ask for a jury trial they will eventually dismiss the case.