noun
local call; intra-city call
A telephone call within the same city or local calling area, as opposed to a long-distance call.
市内通話は市外通話より料金が安い。
Local calls are cheaper than long-distance calls.
市外通話 is a long-distance call (outside the city), while 市内通話 is a local call within the same city.
Compound of 市内 (within the city) and 通話 (telephone call).