Revised regulations that would allow federal workers to call home every day to check on children or baby sitters -- even if it is a long-distance call -- are still awaiting clearance at the Office of Management and Budget.

The rules change was proposed this year by the General Services Administration. The idea was to bring Uncle Sam's telephone rules into the 20th century and make them more like private firms that typically permit employes to make at least one call home per day.

Currently, it is technically illegal for a government worker to use a federal telephone line to call home except in an emergency with supervisory permission. The rule obviously is ignored or bent in many agencies. But it is sometimes enforced in offices where bosses go by the book, or where work is disrupted, left undone or shifted to other employes, when individuals spend long periods on the telephone discussing social activities, real estate or business deals or the evening menu. Allowing employes to make one free call per day from the office, GSA officials theorize, also will make it easier to spot and deal with phone abusers.

GSA wants workers on out-of-town assignments to be allowed to charge one call per day to the government so they can check in with their families. The proposed new rules also would give workers more freedom to call doctors and dentists. Allowances Raised

GSA has raised government per diem and travel allowances covering more than 500 cities. Under the new rules, for example, federal visitors to Washington who were limited to paying $79 a day for lodging can now pay $84. The $33-a-day meal allowance remains the same.

New lodging rates for other cities include: Atlanta, $69; Chicago, $80; Cleveland, $57; Denver, $63; Detroit, $63; Miami, $53; Philadelphia, $74, and Seattle, $58. In all of those cities, the daily meal allowance is $33. In New York, $103 is allocated for lodging and $36 for meals; in St. Louis, it's $57 for lodging and $25 for meals. Job Mart

U.S. Information Agency's Radio Marti has openings for Spanish-speaking secretaries, Grades 6 ($16,521) through 9 ($22,458), and a GS 4 receptionist. Call 485-6314.

Agriculture's Food and Safety Inspection Service wants a GS 11/12 public affairs specialist. Must have civil service status. Call Velinda Magana at 447-6617.

Health and Human Services in Rockville wants a GS 4 through 6 secretary. Call 443-6707.Pension Shopping

National Federation of Federal Employees has a special members-only $5 price for a computer comparison of their likely benefits under both the old and new federal retirement systems.

Most federal workers hired before 1984 must decide this year whether to remain under the regular Civil Service Retirement System, or move into the new federal pension program. Because the two systems are so different and offer different benefits, a number of private firms here have gone into the business of providing computer benefits printouts. Fees for the printouts, which are based on questionnaires filled out by workers, range from $11 to $32. Some federal agencies are or will supply the printouts free, and a number of federal and postal unions are providing special prices for members.

Government Retirement Benefits Inc., of Alexandria is offering special one-on-one counseling ($40 a half-hour) to federal workers seeking pension plan advice in addition to computer comparisons. For information call 461-9100.