Quote:
So if your provider only lets you call someone via keys not on the normal phone pad
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It is essentially not a provider's limitation but a limitation of a typical ATA, e.g. Sipura SPA3102. An all "simple solutions" to this are just "short dial patterns" which can be settled either on ATA itself of on external service such as Voxalot. However, short dial patters are suitable only to provide calls to a fixed list of SIP URIs,
thus lacking universality. This way, the SIPBroker service, which allows numeric-to-alphanumeric translation only for a limited subset of SIP URIs but not for any SIP URI, just lacks this universality too. My first post was just about that.