1. An SMSC stores, forwards, converts and delivers SMS messages between mobile phones and applications. It receives, stores, and delivers SMS messages and maintains timestamps. 2. An NPAC is a telecom industry database that routes phone calls and texts to the correct wireless provider based on phone numbers, processing millions of transactions daily for things like area code splits. 3. SMS aggregators maintain connections to wireless carriers, allowing application providers to send messages to all carriers through one gateway. Application providers build messaging campaigns and engage customers through short codes.

1. Wireless Operators
Short Message Service Center
It’s purpose is to store, forward,
convert and deliver SMS messages.
Basic Type of SMS Traffic to SMSC
∙ Mobile to another Mobile
∙ Mobile to a Application
∙ Application to a Mobile
Tasks of an SMSC
1. Reception of SMS
2. Storage of SMS
3. Delivery of SMS
4. Maintenance of time stamp in SMS
NPAC & Administrators
Number Portability Administra-
tion Center is the telecom
industry's common, authoritative
database used for routing, rating
and billing for telephone numbers
that are no longer assigned to the
original NPA-NXX code holder.
Responsibilities
∙ Data Administration
∙ Mass changes (Area code splits
and LNP transfers)
∙ Processes tens of millions of
transactions every month,
ensuring that the correct and
most current wireless provider is
associated with each cellular
number.
Aggregators
SMS Gateway Provider
An SMS aggregator maintains
direct connections to the major
wireless carriers. They deliver their
customers' text messages, which
they aggregate, through their
gateways. An aggregator allows
you to go to one place to connect
to all of the wireless carriers.
Application Provider
SMS Shortcode Application
Provider
Entities provide services to
businesses to build campaigns
and engage customers through
both dedicated and shared short
codes with text message promo-
tions and alerts.
Type of Application Provider
∙ Custom SMS integration house
∙ Shortcode campaign manage-
ment/consulting
∙ Industry and business specific
SMS software seller
∙ SMS Broker/Reseller
CTIA-TheWireless Association
Cellular Telecommunications
Industry Association
The Wireless Association is an
industry trade group that
represents the international
wireless telecommunications
industry.
Major Function of CTIA
∙ Operations and Standards
Setting
∙ Provides Common Short Code
(CSC) administration services to
wireless services
∙ Wireless Internet Development
∙ Voluntary Guidelines
312
817
972
702
213
212 Type of Aggregators
∙ US Tier 1 (Direct connection
to at least 4 of the 5 US
mobile operators)
∙ US Tier 2 (Direct connection
to at least 3 of 5 US mobile
operators)
∙ Global Consolidator
(Network Interoperability)
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