UDTS - UNITDATA ServiceThis SCCP (Signalling Connection Control Part) connectionless message is utilized when a UDT (UNITDATA) message is undeliverable and the message origi... View more
UE - User EquipmentThe UMTS Subscriber or UE (User Equipment) is a combination of ME (Mobile Equipment) and SIM / USIM (Subscriber Identity Module / UMTS Subscriber Iden... View more
UE-AMBR - UE – Aggregate Maximum Bit RateIn LTE, UE-AMBR is a bandwidth limitation applicable to the total accumulated bandwidth for all of the non GBR bearers a mobile has in place (across a... View more
UE-PC5-AMBR - UE-PCF Aggregate Maximum BitrateIn LTE V2X, UE PC5 links are limited using UE-PC5-AMBR. This limits the aggregated bit rate that can be expected with a peer device. The UE-PC5-AMBR i... View more
UG-CSI - USSD General – CAMEL Subscription InformationThe UG-CSI is held in the HLR and is not sent to any other node. It contains trigger information which is used to invoke a USSD application in the CSE... View more
UI - Unconfirmed InformationIn LLC (Logical Link Control) unacknowledged operation, Layer 3 information is transmitted in numbered UI (Unconfirmed Information) frames. The UI fra... View more
UI - Unnumbered InformationUnnumbered Information frames can be sent in both ADM (Asynchronous Disconnected Mode) and ABM (Asynchronous Balanced Mode). There is no acknowledgeme... View more
UI Channel - User Isochronous data ChannelIn Bluetooth the UI (User Isochronous data) Channel is used to carry L2CAP (Logical Link Control and Adaptation Protocol ) transparent isochronous use... View more
UIM - User Identity ModuleThe User Identity Module may contain information such as the NAM (Number Assignment Module) and subscription feature information. It is possible for t... View more
UL-TFT - Uplink Traffic Flow TemplateAn Uplink Traffic Flow Template is the set of uplink packet filters set out in a TFT. A DL TFT is the set of downlink packet filters defined in a TFT.... View more
ULI - User Location InformationUser Location Information is a group of identities relating to the location of a mobile device within the network coverage area. The ULI can comprise ... View more
Um - Air Interface (GSM)Interface between MS (Mobile Station) and BSS (Base Station System). The Um interface is the GSM / GPRS network interface for providing circuit and pa... View more
UM - Unified MessagingSoftware technology that allows carriers and Internet service providers to manage customer e-mail, voice and fax messages from any phone, personal com... View more
UMA - Unlicensed Mobile AccessUnlicensed Mobile Access is an industry collaboration to extend GSM and GPRS services into customer sites by utilizing unlicensed radio technologies s... View more
UMAN - Unlicensed Mobile Access NetworkAn Unlicensed Mobile Access Network is derived by utilizing existing unlicensed radio technologies such as WiFi (Wireless Fidelity) and Bluetooth to e... View more
UMD - Unacknowledged Mode DataIn UMTS the UMD PDU (Protocol Data Unit) is used to convey sequentially numbered PDU containing RLC (Radio Link Control) SDU (Service Data Unit) data.... View more
UMTS - Universal Mobile Telecommunications SystemA 3G mobile communication system which supports improved data rates over GSM and subsequently provides an enhanced range of multimedia services. UMTS ... View more
Unbalanced lineA transmission line in which the voltage levels on the two conductors are not equal with respect to ground. ... View more