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IMPORTANT Note for 911 Emergency Calling: We recommend that TTY users make
emergency calls by other means, including Telecommunications Relay Services (TRS),
analog cellular, and land line communications. Wireless TTY calls to 911 may be corrupted
when received by public safety answering points (PSAPs) rendering some
communications unintelligible. The problem encountered appears related to TTY
equipment or software used by PSAPs. The wireless industry and PSAP community are
currently working to resolve this.
19 Phone Basics
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