Portland-based phone receptionist service Ruby Receptionists says a cyberattack knocked it offline all-day Friday and disrupted some functions through the holiday weekend.

“In our 15-year history this is the very first time that we’ve had an outage of this significance and the first time we have ever had an attack,” Ruby Receptionists said in a written statement. “We immediately engaged an expert national top security firm and law enforcement to uncover the cause and establish next steps.”

Ruby Receptionist operators answer phones for nearly 10,000 customers, mostly small businesses that don’t have their own receptionists. Its clients include lawyers, contractors and real estate firms, among others.

“Thankfully, customer credit cards were not touched, and at this point in time, we are fairly confident data was not breached,” the company said in its statement. “We are awaiting final confirmation from our forensic team.”

Privately held Ruby Receptionists has nearly 10,000 customers and about 600 employees. The company said revenues grow by 25 percent last year to more than $47 million and it expects sales of nearly $70 million this year.

Ruby Receptionists recently acquired an online business chat service, ProfessionalChats. The cyberattack did not affect those chats, according to the company.

-- Mike Rogoway | twitter: @rogoway | 503-294-7699