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In order to provide Voice over IP call termination services a Tier 2 operator, can initiate call termination over Internet by leasing a portion of network of Tier 1 operator.
Similarly there are Tier 3 operators who can lease a part of network from both Tier 1 and Tier 2 service providers. It saves Tier 2 and Tier 3 operators much of the cost of infrastructure and registration. Technical equipments and infrastructure like routes which need a substantial investment to be incurred are taken care of by Tier 1 operator. Besides them, there are wholesale call termination providers and resellers of voice over IP telephony who also offer similar termination facilities. |
