约定

to agree on sth (after discussion) / to conclude a bargain / to arrange / to promise / to stipulate / to make an appointment / stipulated (time, amount, quality etc) / an arrangement / a deal / appointment / undertaking / commitment / understanding / engagement / stipulation

to weigh in a balance or on a scale

to make an appointment / to invite / approximately / pact / treaty / to economize / to restrict / to reduce (a fraction) / concise

to set / to fix / to determine / to decide / to order

established by popular usage (idiom); common usage agreement / customary convention

committed information rate (Frame Relay) / CIR

unless otherwise agreed

according to agreement / as arranged / as stipulated

committed information rate (Frame Relay); CIR