231225 ⎘
Selecting arrangements; Circuit arrangements for receivers of routing digits for PBX selectors, i.e. private branch exchange selectors
Operating a network node
#2Customization of emergency notifications for communications services
#3Customization of emergency notifications for communications services
#4Identifying and processing, for priority, calls in data communications server
#5Identifying and processing of unreturned calls in IPBX
#6Customization of emergency notifications for telecommunications services
#7Identifying and processing of unreturned calls in IPBX