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<!ELEMENT provider (name+, gsm?, cdma?)>
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<!ELEMENT gsm (network-id*, apn*)>
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<!ELEMENT gsm (network-id*, voicemail*, balance-check*, apn*)>
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<!ELEMENT apn (name*,
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<!ATTLIST apn value CDATA #REQUIRED>
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<!ELEMENT voicemail (#PCDATA)>
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<!-- contains dial string used to access voicemail services for this provider -->
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<!-- for historical/legacy reasons network providers may support various alternative -->
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<!-- dial strings that can be used to access voicemail services -->
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<!ELEMENT balance-check (ussd*,
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<!-- for handset branding and historical/legacy reasons, network providers often -->
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<!-- support a number of alternative methods to check balance/allowance. -->
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<!-- the first element will typically be the default method -->
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<!ELEMENT ussd (#PCDATA)>
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<!-- contains * prefixed string which when sent to the network should result in a response text string from network -->
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<!ELEMENT dtmf (#PCDATA)>
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<!-- contains dial string used to access balance check service via voice call -->
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<!ELEMENT sms (#PCDATA)>
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<!ATTLIST sms text CDATA #REQUIRED>
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<!-- contains dial string and text string used to access balance check service via sms -->
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<!ELEMENT ussd-response (#PCDATA)>
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<!-- similar to standard ussd method but requires user to select options from initial network response -->
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<!-- typically, option 1 followed by option 3 will display remaining credit -->
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<!-- this method does not have widespread use -->
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<!ELEMENT network-id EMPTY>
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<!ATTLIST network-id mcc CDATA #REQUIRED>
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<!ATTLIST network-id mnc CDATA #REQUIRED>
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<!ELEMENT username (#PCDATA)>
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<!-- network-id should contain all the providers's known MCC/MNC codes.
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The MCC should be a three-digit ITU E.212 Mobile Country Code (like
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'310' or '409') and the MNC should be a two- or three-digit GSM
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Mobile Network Code. Even if the provider is an MVNO, it's upstream
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network infrastructure provider's MCC/MNC codes should be included
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so that the MCC+MNC from the IMSI of the MVNO's SIM can be roughly
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matched to the provider.
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<!ELEMENT username (#PCDATA)>
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<!-- username required for authentication when starting a packet data session -->
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<!ELEMENT password (#PCDATA)>
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<!-- password required for authentication when starting a packet data session -->
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<!ELEMENT dns (#PCDATA)>
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<!-- Any static IPv4 DNS servers required for the provider; usually these are
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sent to the client automatically via PPP or PDP context negotiation and
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this value is not used.
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<!ELEMENT gateway (#PCDATA)>
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<!-- Static IPv4 gateway to which IP traffic for the data session should be
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directed to. Usually the gateway is provided automatically via PPP or
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PDP context negotiation and this value is not used.
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<!ELEMENT cdma (name*,
added
removed
serviceproviders.2.dtd
