Firmware:

SIP Ring Switch 4xOut

Model 57753

Current firmware
Date	Changes and comments	Revision
December 8, 2023	Switching behavior in case of failure between primary and secondary telephone system revised	1.69 on request

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Older firmware
Date	Changes and comments	Revision
September 14, 2023	Outputs Pulse Mode - When entering a negative pulse duration the output performs a blink pattern while it is active	1.68 on request
July 10, 2023	Registration with USER ID and password possible for each extension Configuration of a second telephone system for redundant systems possible.	1.67 on request
March 27, 2023	TCP/IP stack - MTU up to max. 1500 possible Actions - Host name for HTTP requests in the head corrected	1.66 on request
February 2, 2023	Homepage - With showing without menu tree, login as User is also possible TLS/SSL - SNI support (Server Name Indication) activated	1.65 on request
December 12, 2022	IP stack - MTU settable IP stack - Improved processing of fragmented UDP packets System start - When boot error occurs update mode is activated for system restore SIP - Use of * in user list improved SIP - Detection of the registration interval for Swyx systems added	1.64 on request
October 28, 2022	DHCP - Processing of the option flags expanded SIP - Processing of fragmented UDP packets improved System start - Configuration initialization optimized	1.63 on request
September 27, 2022	SIP - Problems with manual adding of new subscribers fixed SIP - Register timeout given by the VoIP system is used GUI - Minor optimizations System - Config Upload optimized and accelerated	1.62 on request
August 31, 2022	SIP - Problems with manual adding of new subscribers fixed GUI - Minor optimizations System - Config Upload optimized and accelerated Please use the newest included version of Wutility for the update.	1.60 on request

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