Topology: NE20-----Huawei SBS-------2500+--------ODF grounding
Looping NE20 on ODF frame fails.
Check the configuration and set NE20CPOS as slave clock. Each E1 timeslot is set as master clock. Looping router on timeslot port of SBS fails, but looping router CPOS succeeds. The tail fiber is not problematic. Check CPOS with display controller cpos and find the following:
TX j0 =0x01 j1 =NetEngine C2 =0x02
RX j0 =”Unkown” j1 =”HuaWei SBS” C2 =0x02
CPOS cannot receive j0 byte of SBS and check SBS:
TX j0 =HuaWei SBS j1 =HuaWei SBS C2 =0x02
RX j0 =0x01 j1 = NeEngine C2 =0x02
SBS can receive j0 and j1 sent by NE20.
Change j0 of TX on SBS as 0x01. Check CPOS state on NE20 and RX j0 is 0x01. Loop Ne20 on SBS and NE20 on ODF frame. It is OK. Change TX j0 as default HuaWei SBS, NE20 RX j0 can receive HuaWei SBS. Loop succeeds.
1. The router configuration is problematic.
2. The tail fiber of router and SBS is problematic.
3. Parameter setting of SBS is problematic.
When CPOS timeslot fails. Check j0, j1 and C2.