Phone Number Management

This chapter offers information on how to manage phone numbers when you provide SMS service.

Introduction to Phone Number Managment for SMS service providers

Every SMS has two phone numbers: a recipient phone number (recipient ID) and a sender phone number (sender ID). The recipient ID identifies the mobile device that will receive the SMS on the mobile network. The sender ID identifies the sender.

Phone number management defines the practice of acquiring phone numbers and assigning them to SMS customer. These phone numbers can be used as Sender IDs when SMS messages are sent, and as recipient endpoints for incoming messages.

Phone numbers for outgoing SMS messages

If an SMS is sent through an Internet SMS connection, such as SMPP, CIMD2, UCP, OZX or HTTP, the service provider has the freedom to define any Sender ID. The technology of Application originated (AO) SMS messages, allow the SMS service provider to set any phone number (local or international) or an alphanumeric sender ID for any SMS.

If an SMS is sent through a wireless SMS connection, the SMS always uses the phone number associated with the SIM card that was used to transmit the SMS.

Phone numbers of incoming SMS messages

If an SMS service provider wants to receive incoming SMS messages, mobile phone numbers assigned to his service by the mobile network must be used. If the SMS service provider connects to the mobile network through an Internet SMS connection, the Mobile Network Operator (MNO), or the SMS Aggregator can assign one or more phone numbers to his connection.

If an SMS service provider uses wireless connections to receive SMS messages, the phone nubmers of the associated SIM cards are be used to receive the messages.

Common practice

It is a common practice for SMS service providers to setup Modem pools (also called as SIM banks) or a large number of Android mobile phones to acquire local phone numbers. Thes SIM card based devices allow the SMS provider to receive incoming SMS on multiple phone numbers, that can be assigned to SMS customers.

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