Six sets of equipment formed a SNCP ring. The user configured four central sites A to the four E1s of site E. The equipment of site A was OptiX 155622H(Metro1000) V3 and the equipment of site E was OptiX 155/622(Metro1000) V1R3. After the configuration, the T_ALOS alarm of sites A and E disappeared and the switching service of the user failed.
The tributary FP1D of site E reports the LFA alarm. For details, see the Attachment.
Select the tributary board of site E in the NE manager. Select the protocol mode by Function and modify the protocol mode to UF.E1.
The tributary FPID adopts the Frame tributary board to provide the Framed E1. The opposite site must be set to the Frame mode. Generally, the switching service of users is not required to be set to the Frame mode. Because the tributary of site A is not set to the Frame mode, the service failure is caused by the Frame mode of the tributary of site E.
For the tributary boards of Framed E1, the tributary boards of the corresponding opposite end must also provide the Frame feature. If the Frame feature is not necessary, only set the board to Frame.