Tag Archives: OSN3500

How to do when Failing to Connect the 155 Mbit/s Optical Port on the Router of Company C

When the OptiX OSN 1500 is connected to the 155 Mbit/s optical port of the router of company C, the LP_RDI alarm is generated in the 2 Mbit/s service. The relevant analysis shows that the higher order path overheads of the line board are in the pass-through state, which results in the lower order service… Read More »


Notice on Orderwire Interruptions in GSCC Boards of OSN3500 and OSN7500

Abstract: Few SSN1GSCC02 and SSN3GSCC02 boards have degraded clock signals due to the critical-state quality of clock signals on the orderwire chip SPI and individual variances among boards (for example, in PCB layout and build-out resistor precision). There is a low possibility that these boards experience warm resets. If this occurred on an active SSN1GSCC02… Read More »

NESOFT_MM Troubleshooting

GSCC is a system control and communication board with part number 03020DCM. The GSCC is available in 4 functional versions: N1GSCC,  N3GSCC, N4GSCC, N6GSCC. The functions provided by the functional versions are different. A new GSCC board insert into OSN 3500 at 17# slot, NESOFT_MM alarm reported when main-standby backup finished. :alm-get-curdata-ext:0,0,0  200026      NESOFT_MM    start       2013-12-29 13:17:15+02:00      None         board=18;02 00 03 08 ff;   1.     According to the alarm, the… Read More »

What results the CES Service Down

Customers use analyzer to test CES service on OSN3500, using typical networking and configuration. They found that the analyzer report one alarm every 49 or 50 minutes. CES service was down in a fixed time interval. That is a typical problem caused by clock not synchronized. It can be confirmed by the following two aspects. 1. Enable… Read More »

Do you know the limitaiton of Huawei N3EAS2

  Site engineer found the N3EAS2 can only show 17 VCTRUNCK in Ethernet interface But there are 34 VCTRUNCK in link Aggregation location.   NMS version: V100R006C02SPC200   OSN3500 version: V1R10C02SPC100 The following is snap of just showing 17 VCTRUNCK: The following is the snap of showing 34 VCTRUNCK in link Aggregation location: 1.Query the V1R10C02SPC100 product document… Read More »

Have you ever meet the problem Single End SNCP switching failed?

Problem was reported by customer  that service interruption observed after fiber cut between NE-1565 & NE-1567. All the interrupted services were configured as SNCP and having the protection paths. SNCP services are configured on NE-1567 and NE-6. See diagrams attached. OSN 7500 and OSN 3500 equipments software Version is V1R8 are involved. UP_E1_AIS alarms were… Read More »

What you’ll do when NESF_LOST displayed after a software Upgrade?

Sometime after a software Upgrade from V1R8C02SPC200 to V1R10C03SPC203 one OSN3500 with two GSCC boards displayed the alarm NESF_LOST. NESF_LOST was reported in the standby GSCC board. NESF_LOST inform us that there are missing software files in the GSCC board. According to the alarm parameters it is possible to know which files are missing It was necessary to find out why some… Read More »