Hi, I’m trying to integrate TTY over VOIP and would like to have information regarding the matter. Any information would be helpful. Thank you.
back when i worked at the Telco, we simply attached an ATA / analog telephony adapter to the VOIP platform and used a legacy TTY device.
I assume this is what is called TDD in the UK, i.e. text communication for the deaf, rather than ASR33 type teletypes. As it says in https://www.lumen.com/help/en-us/voip/equipment/using-a-tty-machine-and-trs-with-voip.html the key thing is you must use a reasonable quality 3.1kHz audio codec, typically the variant of G.711 (A-law or µ-law) as used by your country’s PSTN network. You mustn’t use a speech type codec, like GSM or G.729.
HDVOICE and teletype / tdd do not mix.
Oh there will be no added support integration on my part (VOIP service) ? Thank for the quick reply.
Ok got it. Thank for the info.
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