Gateway Services

Provide highly secure and reliable transport and data access with AT&T Gateway Services to support efficient call processing.

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ISDN User Part (ISUP) Gateway

AT&T’s ISDN User Part (ISUP) Gateway provides transport  of your SS7 trunk call set-up messages to other service providers' networks throughout the U.S. and Canada, saving you the time and expense of establishing SS7 links to multiple networks. This service transports SS7 signaling for traffic carried over your Feature Group D trunks  to all RBOC/LEC access tandems and end offices, as well as your message trunks to CLECs, wireless providers and interexchange carriers without having to connect SS7 links to each LATA network. The SS7 team at AT&T will customize the service to fit your specific requirements and will coordinate the many activities required to establish connections to other LATA networks. Our service simplifies SS7 transport, improves operational efficiency and is extremely cost effective compared to building out your own SS7 network. Plus get access to a comprehensive suite of SS7-based services – all carried on the same links as your call set-up messages.

Data Gateway

AT&T’s Data Gateway service supports industry efforts to accurately match telephone numbers to local service providers in order to reduce billing errors and help eliminate Return Code 50 rejects. The “Least Cost Query” feature is designed to provide you access to more economical query types by determining whether they are supported by the distant database. Queries may be processed as a batch file or on a real-time basis depending upon your service needs. Data Gateway is a great tool for revenue assurance programs and supports wireless SMS message routing applications, billing validation, interconnection validation and more.

LNP Gateway   

AT&T’s Local Number Portability (LNP) Gateway provides access to national ported telephone number information - both wireline and wireless. AT&T’s platform contains the routing information provided to the industry by the seven regional U.S. NPACs (Number Portability Administration Centers).

8XX Gateway

AT&T’s 8XX Gateway facilitates proper routing of toll-free telephone calls.  AT&T maintains an updated 8XX Database with direct access to the National Service Management System (NSMS). This service translates the dialed 8XX number to a POTS number, and/or to a carrier identification code (CIC), which is then returned to your switch for further call processing.  

Custom Local Area Signaling Services (CLASS)  Gateway

AT&T’s Custom Local Area Signaling Services (CLASS) Gateway provides interoperability between local service providers for IntraLATA CLASS features. CLASS features are activated in the serving end office through subscriber line records. The information is transported through the network using Transactional Capabilities Application Part (TCAP) messages passed over the SS7 network. CLASS features include: Missed Call Dialing (*69) and Call Again (*66).

Service Order Administration (SOA) Gateway

Service Order Administration (SOA) Service Bureau is designed to provide a low-cost solution for Local Number Portability (LNP) record administration. LNP allows an end user to keep his or her telephone number when changing service providers. This requires negotiation between service providers, as well as notification to the Number Portability Administration Center (NPAC).  

AT&T's hosted platform offers an efficient and cost-effective alternative to establishing service provider and NPAC connectivity, and owning/managing a SOA platform. Porting requests are transmitted over a highly secure Virtual Private Network (VPN) which is administered by a user-friendly web GUI. AT&T's SOA Service Bureau can also support the pre-port notification process between service providers.