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With the advent of the
Internet and widespread availability of high speed Internet connections, GIP could be redesigned to make use of Internet instead of ISDN connections. However, the industry has gone in the direction of using GAN/UMA, which substitutes an 802.11 or Bluetooth air interface for
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Most probably, the fact that the system requires an ISDN connection, which in most countries where ISDN is popular is priced by time used, has made GIP a difficult sell. In practice, the system appears to be oriented towards carriers instead of individuals, and carriers can more easily create
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that allows a DECT base station to form part of a GSM network, given suitable handsets. While proposed and tested, notably in
Switzerland in 1995, the system has never been commercially deployed. Infrastructure issues make it less practical and useful to implement than the more recent
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While GIP was deployed to some success at
Telecom '95 in Geneva, the system has not been commercially deployed since. Hybrid DECT/GSM devices have appeared, but these have essentially been "Two phones in a box" systems that combine the functionality of a standard
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standard, GIP makes use of a technology that doesn't require licensed spectrum to expand capacity and allow end users, in theory, to improve coverage in areas difficult to reach via large, external, cell towers.
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In GIP, several of the GSM lower level protocols are replaced by DECT-friendly equivalents. Voice channels make use of 32 kbit/s ADPCM channels rather than 13 kbit/s FR/EFR/AMR channels, for example.
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phone with a GSM phone, so that a person can receive and make calls on either their home phone line or a mobile network without having to use two phones. An example of this approach is BT's/Ericsson's
63:, and authentication is done via the GSM SIM card as normal. However, DECT terminals need to authenticate themselves against the base station, and this added layer is implementation dependent.
52:, meaning a set of protocols that runs over the base DECT system. The most popular profile for DECT is GAP, which is used to provide cordless phone service, but this is not used for GIP.
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The base station is usually connected back to the GSM network via an ISDN line. An "A interface" is implemented over the ISDN line just as it would be for a
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system, which can make use of usually unmetered and neutral
Internet service to provide the connection back to the network operator.
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microcells using their own spectrum, running ordinary GSM and not requiring the use of special handsets.
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107:: ETR 341: Radio Equipment and Systems (RES) DECT/GSM Internetworking Overview
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GSM/UMTS's and as such can use unmodified commodity infrastructure.
23:, usually abbreviated to GIP and sometimes to IWP, is a profile for
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DECT Web: DECT/GSM DUAL MODE and the advent of the ONEPHONE SERVICE
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163:Mobile telecommunications standards
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21:GSM Interworking Profile
59:The system supports
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40:Like the later
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48:GIP is a DECT
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16:DECT profile
74:Deployments
36:Description
157:Categories
99:References
143:Microcell
87:service.
148:Picocell
117:See also
85:OnePhone
123:GAN/UMA
61:handoff
50:profile
42:GAN/UMA
30:GAN/UMA
168:DECT
133:DECT
105:ETSI
25:DECT
19:The
138:GAP
128:GSM
81:GAP
68:BSC
159::
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