Outgoing or incoming, communication between the city government and the public it serves have picked up speed with a pair of new messaging systems.

One uses automatic dialing technology to allow the city to send telephone messages to all households in about 20 minutes.

The other is a 311 system that allows residents to submit requests for service, make a complaint or ask a question via computer, and also catalogs similar phone messages.

The automated dial system is primarily intended for emergency notifications, such as of utility outages or snow storm parking bans. The $56,000 annual cost is paid for by the Department of Homeland Security.

The city, however, has used it for mundane purposes. The inaugural message announced the start of street sweeping. Mayor John DeStefano later demonstrated the system by sending a message offering limited free bus rides to people who ordinarily drive to work.

He said the city would be careful to employ the system sparingly, so as not to antagonize residents already besieged with automated messages from political candidates or marketers.

The system is able to reach the some 27,000 households, out of a total of about 50,000, that have listed phone numbers. It may be adapted to allow residents to enter their cell phone numbers.

It can be programmed to dial all the numbers, or to send targeted messages to specific neighborhoods. The second message sent over the system, for instance, went to residents in the 06513 zip code, announcing the closing of two bridges.

The computer based “Web 311” system contains formats for 156 different types of service requests, such as for tree trimming or to investigate odor from a sewer.

In the weeks after its launch in November, most requests logged concerned snow plowing and were phone in. A few reported missing trash bins.

As the system ages, its accumulated requests should help the city identify areas that need concentrated help, said city spokesperson Jessica Mayorga.