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Can someone explain in detail a yellow alarm or RAI in E1 or T1? giritharan 09-January-2008 12:07:25 PMComments In general it indicates the user-network interface loss. Posted by HamidAliKhan Yes It basically indicates the user-network interface loss. Posted by waqqas1 RAI: Acronym of Remote Alarm Indication also called Loss of Frame Alignment It basically indicates the user-network interface loss. Posted by sagitraz YELLOW: remote alarm indication (RAI): The RAI (remote alarm indication) signal indicates loss of layer 1 capability at the user-network interface. RAI propagates towards the network if layer 1 capability is lost in the direction of the user, and RAI propagates toward the user if layer 1 capability is lost in the direction of the network. The transmission of Loss of Frame Alignment (LFA) – also called Remote Alarm Indication (RAI) – and idle data link sequence in m-bits is mandatory. The other use of m-bits is optional, but when a function other than mandatory functions is used, the specification described here should be applied to guarantee the interworking of terminals. Posted by colinrankin |
Posted: 09-January-2008 12:24:12 PM By: colinrankin YELLOW: remote alarm indication (RAI): The RAI (remote alarm indication) signal indicates loss of layer 1 capability at the user-network interface. RAI propagates towards the network if layer 1 capability is lost in the direction of the user, and RAI propagates toward the user if layer 1 capability is lost in the direction of the network. The transmission of Loss of Frame Alignment (LFA) – also called Remote Alarm Indication (RAI) – and idle data link sequence in m-bits is mandatory. The other use of m-bits is optional, but when a function other than mandatory functions is used, the specification described here should be applied to guarantee the interworking of terminals. | |
Posted: 29-December-2008 12:29:12 PM By: sagitraz RAI: Acronym of Remote Alarm Indication also called Loss of Frame Alignment It basically indicates the user-network interface loss. | |
Posted: 31-December-2008 08:09:19 AM By: waqqas1 Yes It basically indicates the user-network interface loss. | |
Posted: 30-January-2009 12:48:33 AM By: HamidAliKhan In general it indicates the user-network interface loss. |