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ETSI and 3rd Generation Partnership Project (3GPP) standards, such as GSM and LTE, define supplementary service codes that make it possible to query and set certain service parameters (e.g., call forwarding) directly from mobile devices.
The user submits a code corresponding to the service available. USSD can be used to provide independent calling services such as a callback service (to reduce phone charges while roaming), enhance mobile marketing capabilities or interactive data services. USSD is commonly used by prepaid GSM cellular phones to query the available balance.
Data requirements can also be identified in the contract via special contract clauses (e.g., DFARS), which define special data provisions such as rights in data, warranty, etc. SOW guidance of MIL-HDBK-245D describes the desired relationship: "Work requirements should be specified in the SOW, and all data requirements for delivery, format, and ...
CRCX - Conrail Shared Assets Operations - Legal Name: Conrail; CRCZ - Norfolk Southern; CRDX - Chicago Freight Car Leasing Company; CREU - Canadian Retail Shippers Association; CREX - Merchants Investment Company; Citicorp Railmark, Inc. CREZ - Canadian Retail Shippers Association; CRGX - Cargill, Inc. CRIJ - Carolina Rail Services, Inc.
For the fiscal year 2009, about one out of every 100 taxpayers were chosen for an audit. In terms of numbers, 1.4 million taxpayers were selected for either a correspondence or a personal audit.
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This list contains the mobile country codes and mobile network codes for networks with country codes between 300 and 399, inclusively – a region that covers North America and the Caribbean. Guam and the Northern Mariana Islands are included in this region as parts of the United States.
USSD gateway is based upon the ability of the delivery agent or the source to send and receive USSD messages. A USSD is a session-based protocol. A USSD is a session-based protocol. USSD messages travel over GSM signalling channels, and are used to query information and trigger services.