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US 6,205,328 B1Granted
Method for providing supplementary services to a mobile station by sending DTMF tones to a remote party of an active call
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsSven Jörgen Lantto, Mats Ola Stille
Life of this patent
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Abstract
Methods and systems for signalling between a mobile station and a network for requesting supplementary services are disclosed. The network implicitly assumes that signals from a mobile station relate to either a held or active call or that a second action is required after the requested action is performed so that the complexity of the mobile unit can be reduced.
Claims1
A signalling method for a radiocoinmunication system having a mobile station and a network comprising the steps of:
- establishing an active call and a held call between said mobile station and said network;
- transmitting a signal from said mobile station to said network requesting that DTMF tones be transmitted;
- detecting, in said network, that said mobile station has a call on hold;
- and
- interpreting, in said network, said signal as a request to send DTMF tones to a remote party associated with said active call;
- and
- sending DTMF tones to said remote party associated with said active call rather than to a remote party associated with said call on hold.
4 more elements
Dependencies are inferred from the claim text.