From my understanding, all calls to 911 in the United States are recorded. How does 911 legally record calls in states where consent to record is required?
I know that some states where consent of all parties simply requires a recorder warning tone, such as the State of California:
G.O. 107-B defines disapproved monitoring of telephone calls as the use of equipment which allows a third person to overhear or record a telephone conversation without any indication to the conversant parties that they are being overheard, or without allowing the conversant parties to communicate with the third person. A person wishing to listen in on a conversation without violating the regulation can provide notice by using a beep-tone warning device audible to all parties to the conversation or by announcing to the parties that the conversation is being monitored. The order requires utilities to file tariffs prohibiting monitoring unless notice is given to the parties to the conversation, or their consent is obtained. If a telephone company learns that a customer is monitoring conversations in violation of the tariff, the order requires the utility to discontinue service if the customer does not refrain from such monitoring within five days after notice from the utilities. The customer can file a complaint with the CPUC if discontinuance is threatened, and the customer's service will not be discontinued pending resolution of the complaint.
but how the other states where consent is required and a beep isn't enough?
Maryland All Parties Md. Code Ann., Cts. & Jud. Proc. § 10-402 (a): The Wiretapping and Electronic Surveillance Act holds that it is unlawful to take or record a communication without the consent of all parties.