In regard to E9-1-1 signaling, a Wink is a temporary on-hook signal of between 200 and 300 milliseconds duration, used on analog circuits utilizing MF or DTMF signaling.

Relevant NENA Documents
Note: To find and download the document, copy the document number (like NENA-STA-010) from below and search the NENA Standards and Documents page.

NENA-STA-027, NENA E9-1-1 PSAP Equipment Standards