![Communication EOC [E1/STM1] Data link
No EOC channel is present
on selected tributary in
on selected tributary in
selected timeslot : wrong
port address configuration
p g
or no tributary input
(LOS).EOC is the channel
involved in management
involved in management
communication.
If EOC 2Mb link is active:
If EOC 2Mb link is active:
- Management is cut (no
remote)
- If relative LOS is active,
traffic on that tributary is
out
ALplus2/ALCplus2 5
out](https://image.slidesharecdn.com/alarmsgroupingcurrentalarms-230517195533-b4078f82/85/Alarms_grouping_Current_Alarms-pdf-5-320.jpg)
![BaseBand Sets STM1 (T0) LTI Alarm
Disconnect cables STM1, after
the duration LTI Set Time (Loss
(
Timing Input) [0..60sec], there
will be the alarm Major “SETS
STM1-WEST (T0) LTI Alarm”
STM1-WEST (T0) LTI Alarm
Reconnect cables STM1, after
the duration WTR (Wait To
(
Restore), change the status
Free Running at Locked and
after the duration LTI Reset
after the duration LTI Reset
Time (Loss Timing Input)
[0..60sec] the alarm Major
“S S S 1 S ( 0)
“SETS STM1-WEST (T0) LTI
Alarm” will be clear.
ALplus2/ALCplus2 41](https://image.slidesharecdn.com/alarmsgroupingcurrentalarms-230517195533-b4078f82/85/Alarms_grouping_Current_Alarms-pdf-41-320.jpg)
Alarms_grouping_Current_Alarms.pdf
- 1. Alarms grouping : Current Alarms Alarms are divided in groups: the name of the group is the name of the module where alarms come from, or the name of a specific characteristic of these alarms SCT SCT WEBLCT ALplus2/ALCplus2 1
- 2. Alarms groups : COMMON Alarms related to Controller module and EOC channel. ALplus2/ALCplus2 2
- 3. Alarms groups : COMMON • Alarm Causes Alarms that could have generated the alarm Equip. Man Op Manual operation active Equip. Man Op Manual operation active (check list) Rmon (Remote Monitoring) Statistic counter Ethernet C 2Mb/ EOC D t Li k T ib ith EOC i i i EOC t ib LOS Comm. 2Mb/s EOC Data Link Trib with EOC is missing EOC trib LOS 2Mb/s G704 Line Side AIS Trib with EOC has AIS 2Mb/s G704 Line Side Fail Trib with EOC is missing EOC trib LOS 2Mb/s G704 Line Side Fail Trib with EOC is missing EOC trib LOS 2Mb/s G704 Radio Side AIS Trib with EOC has AIS from remote 2Mb/s G704 Radio Side Fail Trib with EOC is missing from remote EOC trib LOS Comm. Radio EOC Data Link Link EOC is missing Link ID Controller waiting for restore Configuration mismatch (download backup) Lan Cable Fail EOC LAN cable missing ALplus2/ALCplus2 3 g
- 5. Communication EOC [E1/STM1] Data link No EOC channel is present on selected tributary in on selected tributary in selected timeslot : wrong port address configuration p g or no tributary input (LOS).EOC is the channel involved in management involved in management communication. If EOC 2Mb link is active: If EOC 2Mb link is active: - Management is cut (no remote) - If relative LOS is active, traffic on that tributary is out ALplus2/ALCplus2 5 out
- 6. 2Mb/s G.704 (Trib.x) R di F il/AIS d/ Li F il/AIS Radio Fail/AIS and/or Line Fail/AIS When management When management messages come via tributary timeslot, f h h k further checks are performed on both directions of used directions of used tributary To clear the alarm, set : 2Mb selector = 0 Slot Selector = 0 ALplus2/ALCplus2 6
- 7. Communication Radio EOC Data link No link between Local and Remote station or wrong port address configuration. g EOC is the channel involved in management communication. If EOC radio link is active: If EOC radio link is active: - Traffic is OK - Management is cut (no remote) ALplus2/ALCplus2 7
- 8. Equipment controller waiting for fi ti d t t configuration data restore Press Here When MCU is been replaced ALplus2/ALCplus2 8
- 9. Alarms groups: ETH LAN Alarms (internal and external) regarding Ethernet traffic and relevant ports. p ALplus2/ALCplus2 9
- 10. Alarms groups: ETH • Alarm Causes Link loss Loss of Ethernet signal Sync Gigabit frame not aligned Sync Gigabit frame not aligned Auto Negotiation Auto negotiation failed Link loss forwarding Link loss in remote ports ALplus2/ALCplus2 10
- 11. Alarms groups: LIM Alarms coming from LIM failure or from: • Tx direction - external failure (tributary LOS) • Rx direction - alarms in previous module (RIM, ODU) or external failure (bad propagation or remote alarmed or no remote) remote) ALplus2/ALCplus2 11
- 12. Alarms groups: LIM • Alarm Causes Trib Signal Loss Enabled trib missing or disabled trib present g g p Trib AIS AIS present in input Modulator Fail Modulator fail or without/low quality input D d l F il D d l f il i h /l li i Demodulator Fail Demodulator fail or without/low quality input ODU-IDU communication fail Signal from ODU missing ALplus2/ALCplus2 12
- 13. Tributary-1 Signal loss Loss Of Signal alarm is active when a situation opposite to that foreseen by configuration is performed on tributary interface: No input or o pu o cable disconnected ALplus2/ALCplus2 13
- 14. Branch-x Modulator/Demodulator Fail This alarm is active when the Modulator / Demodulator not transmit / receive the data signal. g Demodulator fail can be when the remote radio is power OFF Traffic is cut Traffic is cut ALplus2/ALCplus2 14
- 15. Branch-x ODU-IDU Communication fail This alarm occurs when on carrier used to receive information from ODU, or remote commands from other side, are detected: are detected: CRC errors Loss of frame This carrier is separated from carrier used for opposite direction (IDUODU) and from TX or RX carriers ( ) ALplus2/ALCplus2 15
- 16. Alarms groups: NODE Al l t th ti b t th IDU i th Alarm relevant the connections between the IDUs composing the node. Alarm Causes Los NBUS cable missing Lof FAW not recognized MsAis MsAIS in NBUS frame payload Check Wrong NBUS connection order between IDUs ALplus2/ALCplus2 16 Check Wrong NBUS connection order between IDUs
- 17. Node (1 or 2) Signal Loss Alarm NBUS cable, connecting different Nodal IDU of the same node, is missing. IF IDU is a “no Nodal” unit, alarm is disabled. NBUS cable F03471* despite RJ45 connector is not an Ethernet cable cable F03471 , despite RJ45 connector, is not an Ethernet cable Node (1 or 2) Signal Lof Alarm Node ( o ) S g a o a The FAW, Frame Alignement Word in the signal on NBUS connection, has not been recognized connection, has not been recognized Node (1 or 2) MsAIS Alarm ( ) The payload in the frames of the signal in NBUS connection does not contain the 126 E1 streams but AIS signal: a LOS or g LOF alarm is present in another NBUS connection. (Not active at the moment) ALplus2/ALCplus2 17 *Siae code ( )
- 18. Node (1 or 2) Check Alarm The Nodal IDUs connected through NBUS cable don’t have the same Identifier. Identifier is not modificable by the user IDU 1 NB1 NB2 LAN 1 LAN2 From LAN 1 of IDU8 From NB1 of IDU8 IDU 2 NB1 NB2 LAN 1 LAN2 IDU 3 NB1 NB2 Max 8 LAN 1 LAN2 Max 8 . . . . . . . . . IDU 8 NB1 NB2 LAN 1 LAN2 To LAN 2 of IDU1 To NB2 of IDU1 ALplus2/ALCplus2 18 To LAN 2 of IDU1 To NB2 of IDU1
- 19. Alarms groups: P.M. (Performance Monitoring) Alarms regarding all measurements performed in Performance Monitoring section. Performance Monitoring Description G828 radio Quality measurements on on signal radio received G828 LimA E1 line side Quality measurements on E1 line side G828 LimA E1 radio side Quality measurements on E1 radio side Rx Pwr radio Rx power measurements Tx Pwr radio Tx power measurements ACM radio Radio Modulation Monitoring g G829 RST B1 Quality measurements on RST (STM1) G829 MST B2 M1 Quality measurements on MST (STM1) ALplus2/ALCplus2 19 G829 MST B2 M1 Quality measurements on MST (STM1) G829 RST B1 Quality measurements on Vc12 (STM1)
- 20. Alarms groups: Plug-in module Alarms relevant the plug-in modules used for STM-1 lines. ALplus2/ALCplus2 20
- 21. Alarms groups: RADIO Alarms not relevant to a specific module but relevant to the link. ALplus2/ALCplus2 21
- 22. Alarms groups: RADIO • Alarm Causes Alarms that could have generated the alarm Alarm generated Link ID Wrong ID received Link Telemetry Fail Link ID Wrong ID received Link Telemetry Fail Link Telemetry Fail Radio link missing Link ID Comm, radio EOC data link Revertive Radio link working on reserve branch Alarms of the preferential branch Tx Fail Tx switch on remote Ber PRBS Fail PRBS not receiving Reduced C i Degraded radio link capacity (A l T d l i ≠ Capacity (Actual Tx modulation ≠ Upper modulation) ALplus2/ALCplus2 22
- 23. Link ID Alarm is on if Link ID check is enabled (Link ID 0) and remote Link ID is different from the local one. Traffic is cut but signal is received and measured. Thi l This alarm causes: - Traffic is cut Traffic is cut - OK Management ALplus2/ALCplus2 23
- 24. Link telemetry fail No link between Local and Remote station. Traffic is cut. Link telemetry is inserted in main radio frame in Bit Insertion y circuit inside LIM, and contains commands for the remote station: switch off the radios on remote side in case of local RF loop Link ID ATPC info loop, Link ID, ATPC info. Telemetry link is a connection between local and remote IDUs. TEST - if this alarm occurs, a double IDU loop (both branches) can be done: if this alarm disappears, local IDU is OK and the problem is after (propagation local radios remote equipment) problem is after (propagation, local radios, remote equipment). ALplus2/ALCplus2 24
- 25. Revertive When a branch is d l d f ti l declared preferential, the switch on opposite branch gives Revertive b a c g es e e e alarm. The return to preferential branch, when available again, happens after “Wait happens after Wait Time” period or press Reset. ALplus2/ALCplus2 25
- 26. Tx Fail When on remote side both radios don’t receive, on local side a Tx switch command is performed and Tx fail alarm is enabled. When this alarm is on, check local ODU in stand by check local ODU in stand by This functionality is enabled in LCT – General Preset in LCT General Preset The alarm remains active until Reset is given ALplus2/ALCplus2 26
- 27. PRBS Fail When PRBS is working and no signal is received on checked i l i PRBS i d th fi ld S L Al i ti signal, in PRBS window the field Sync Los Alarm is active together with PRBS Fail in Current alarms window Every ON-OFF transition increases the field PRBS Fail Alarm Counter ALplus2/ALCplus2 27
- 28. Adaptive Modulation Reduce Capacity N ifi i Notification When ACM Engine is When ACM Engine is enable in both radio (L l d R t ) d (Local and Remote) and the Power receive is not enough (too low) respect the normal condition. ALplus2/ALCplus2 28
- 29. Alarms groups: RIM Alarms coming from RIM failure. ALplus2/ALCplus2 29
- 30. Alarms groups: RIM • Alarm Causes Alarm generated Power Supply 48 Vdc input missing, dc output not RF unit not compliant responding Cable Open IDU-ODU cable cut or not connected RF unit not responding / responding / Comm. Fail Cable Short IDU-ODU cable damaged (shortened) RF unit not g ( ) responding / Comm. Fail C bl O d P l i k RF i Cable Open and Short (both active) Power supply is weak RF unit not responding / Comm. Fail ( ) ALplus2/ALCplus2 30
- 31. Branch-x Cable open/short This alarm is active when the following situations occur: g - Cable open alarm no current through cable interface: ODU is not supplied so situation looks not supplied… so situation looks like PSU alarm (Rx alarms) with cable alarm instead PSU alarm - Cable short alarm overcurrent/low voltage through cable interface cable interface Conseguence of Cable open Radio1A C bl IF O R di 1A ALplus2/ALCplus2 31 Cable IF Open Radio1A
- 32. Alarms groups: RT Alarms coming from RT (ODU) failure. ALplus2/ALCplus2 32
- 33. Alarms groups: RT • Alarm Causes Alarms that could have generated the alarm Alarm generated Rx power low Rx signal lower than Rx threshold Remote Tx not working / Bad propagation LIM quality alarms Tx power low RT failure if Tx is Man Op (Tx Off) Tx power low RT failure if Tx is ON Man Op (Tx Off), Modulator fail IDU-ODU RT o relevant communication RIM damaged RT VCO fail RT failure IF f il RT f il if T i M O (T Off) IF fail RT failure if Tx is ON Man Op (Tx Off), Modulator Fail Rx Quality alarm BER ≈ 10E-6 Q y Rx Quality warning BER ≈ 10E-10 ALplus2/ALCplus2 33
- 34. RT Rx Power Low This alarm occurs when Rx power is under a d fi d th h ld defined threshold Threshold value can be t f b th b h i set for both branches in range: 40 dBm 99 dBm in -40 dBm- 99 dBm in LCT - General preset The alarm Rx Power Low Decrease this value below – 60dBm T l th l The alarm Rx Power Low is a branch alarm and it is used to drive Rx switch To clear the alarms ALplus2/ALCplus2 34
- 35. RT Tx Power Low This alarm occurs when Tx power is 3 dB under standard power is 3 dB under standard output of ODU-RF unit. ATPC or manual attenuation do ATPC or manual attenuation do not affect this alarm that is given by internal failure of the radio. This alarm can be activated by a manual operation also: Tx Transmitter off in Radio Branch Transmitter off in Radio Branch - Settings If both Rx Power Low and Tx If both Rx Power Low and Tx Power Low are active, RF unit inside ODU is faulty ALplus2/ALCplus2 35
- 36. IDU-ODU Communication fail This alarm occurs in ODU when on carrier used to This alarm occurs in ODU when on carrier used to receive command from IDU, are detected: CRC errors CRC errors Loss of frame Thi i i t d f i d f This carrier is separated from carrier used for opposite direction (ODUIDU) and from TX or RX carriers carriers ALplus2/ALCplus2 36
- 37. RT VCO fail This alarm occurs when VCO in RF unit is not able to lock any frequencies. lock any frequencies. Every problem in VCO causes alarms in both directions: RF unit is not able to convert IF Tx in RF directions: RF unit is not able to convert IF Tx in RF Tx (Tx Power Low alarm) and RF Rx in IF Rx . ALplus2/ALCplus2 37 Possible Solution: Check and Replace cable IF
- 38. RT If fail This alarm occurs when is not present IF signal inside p g ODU. There are two different IF signals but one alarm only. IF Tx: the alarm is on with Tx Power Low IF Rx: the alarm is on with all Rx alarms IF Rx: the alarm is on with all Rx alarms When VCO is faulty, RF unit gives a IFRX signal made up of noise: this is enough to mantain IF fail alarm off up of noise: this is enough to mantain IF fail alarm off. ALplus2/ALCplus2 38
- 39. RT Rx Quality Warning Alarm RX Quality Warning BER ≈ 10E-10 RX Quality alarm BER ≈ 10E-6 ALplus2/ALCplus2 39
- 40. Alarms groups: SETS Alarms (internal and external) relevant to the synchronism sources and their setting. Alarm Causes T0Squelch T0 Synch missing T4Squelch T4 Synch missing FreeRunning Equipment in FreeRunning status Holdover Equipment in Holdover status ALplus2/ALCplus2 40 SynkLos Selected Synch missing SynkDrift Selected Synch bad quality
- 41. BaseBand Sets STM1 (T0) LTI Alarm Disconnect cables STM1, after the duration LTI Set Time (Loss ( Timing Input) [0..60sec], there will be the alarm Major “SETS STM1-WEST (T0) LTI Alarm” STM1-WEST (T0) LTI Alarm Reconnect cables STM1, after the duration WTR (Wait To ( Restore), change the status Free Running at Locked and after the duration LTI Reset after the duration LTI Reset Time (Loss Timing Input) [0..60sec] the alarm Major “S S S 1 S ( 0) “SETS STM1-WEST (T0) LTI Alarm” will be clear. ALplus2/ALCplus2 41
- 42. BaseBand Sets STM1 (T0) Drift Alarm Drift: clock frequency is out of range BaseBand Sets T0 Fail alarm Sync input: no synchronismous source (in input) is available or without problem BaseBand Sets T4 Fail alarm BaseBand Sets T4 Fail alarm Sync output: T4 synchronismous generation is not il bl available ALplus2/ALCplus2 42
- 43. Alarms groups: SNTP Alarms regarding the SNTP server. Alarm Causes Unicast Server Lost Server is missing Unicast Server Lost Server is missing ALplus2/ALCplus2 43
- 44. Alarms groups: STM1 Alarms (internal and external) relevant to STM1 stream, line side. Alarm Causes Alarm generated Los Enabled trib missing or disabled trib present f i d Lof FAW not recognised B2ExcessiveBer Excessive BER B2SignalDegraded Signal Degraded J0TraceIdentifierMismatch J0received is not the expected one QECC alarm MsAis AIS in Multiplexer section MsRdi RDI in Multiplexer section ALplus2/ALCplus2 44 p
- 45. Alarms grouping : UNIT This group generates alarms when one of the units, the equipment consists of, is faulty or does not q p y respond to controller polling ALplus2/ALCplus2 45