And the best thing is that you’ll never again have to worry about the Christmas tip:

[Colin] Foster is the vice president of sales and marketing for Virtual Doorman, the top product of a security firm called Virtual Service, which promises to offer residents and managers of small buildings the services of a professional doorman at a fraction of the cost — without skimping on security or convenience.

It used to be that small walkups were second-class buildings,” Foster said. “They did not fetch the same pricing as a doorman building. Now, small buildings can offer those same amenities.”

Virtual Doorman is a standalone, computerized system that integrates with a building’s own computers while linking its high-end color video monitors with the building’s existing intercoms, Foster said.

The electronic system is manned remotely 24 hours a day by a third-party agency that is linked directly to the building’s local fire department, police and medical services.

The system is monitored constantly, and can perform all the tasks of an old-fashioned, human doorman, Foster said, including screening guests, accepting deliveries and laundry, and unlocking doors for tenants who lost their keys.

Foster insists man and machine can co-exist. It is written into their policy that Virtual Doorman will not replace any members of 32BJ, the union that represents workers including New York doormen.

. . .

Still, the union thinks there’s no substitution for old-fashioned manpower. “The experience and training of doormen, combined with their familiarity of residents cannot be replaced by electronic services that control building access from remote locations,” according to a 32BJ statement.

“The safety of New Yorkers living in condominiums and apartments belongs in the real-life hands of diligent doormen who can maintain on-site control of their buildings.”

Backstory: Here’s A Tip . . .