The Multi Link ports (ML)

[18:42:32] ABILIS_CPX: D P PO:ML

PO:521 ------------------------------------------------------------------------
ML     LOG:DS        CRYPT:NO        CRKEY:DFT      T1:1000  T3:3000   N2:3
       ROLE:MASTER   MAXBW:2400      MINDATABW:0             DDT:60    VDT:30
       NORM-TH:50    FAST-TH:75      NORM-TIME:60   FAST-TIME:10
       Drx-pool:30   DRX-TOUT:3000   Vrx-pool:10    Vtx-pool:10   VTX-TOUT:500
       ------------------------------------------------------------------------
       SLINK:200      Chan:0                    CHAN-LIMIT:0
                      CGI:*                     SGI:*
                      CDI:*                     SDI:*
       CDOMAXCONN:2   CGO:#                     SGO:#
       CDONRTY:5      CDO:#                     SDO:#
       ------------------------------------------------------------------------
                         *** NO PLINKs CONFIGURED ***

PO:521 ------------------------------------------------------------------------
ML     LOG:DS        CRYPT:NO        CRKEY:DFT      T1:1000  T3:3000   N2:3
       ROLE:MASTER   MAXBW:2400      MINDATABW:0             DDT:60    VDT:30
       NORM-TH:50    FAST-TH:75      NORM-TIME:60   FAST-TIME:10
       Drx-pool:30   DRX-TOUT:3000   Vrx-pool:10    Vtx-pool:10   VTX-TOUT:500
       ------------------------------------------------------------------------
       SLINK:200      Chan:0                    CHAN-LIMIT:0
                      CGI:*                     SGI:*
                      CDI:*                     SDI:*
       CDOMAXCONN:2   CGO:#                     SGO:#
       CDONRTY:5      CDO:#                     SDO:#
       ------------------------------------------------------------------------
                         *** NO PLINKs CONFIGURED ***

PO:523 ------------------------------------------------------------------------
ML     LOG:DS        CRYPT:NO        CRKEY:DFT      T1:1000  T3:3000   N2:3
       ROLE:MASTER   MAXBW:2400      MINDATABW:0             DDT:60    VDT:30
       NORM-TH:50    FAST-TH:75      NORM-TIME:60   FAST-TIME:10
       Drx-pool:30   DRX-TOUT:3000   Vrx-pool:10    Vtx-pool:10   VTX-TOUT:500
       ------------------------------------------------------------------------
       SLINK:NONE
       ------------------------------------------------------------------------
       Pl:1   ST:RUNNING   LOWPO:1     SPEED:64000

PO:524 ------------------------------------------------------------------------
ML     LOG:DS        CRYPT:NO        CRKEY:DFT      T1:1000  T3:3000   N2:3
       ROLE:MASTER   MAXBW:2400      MINDATABW:0             DDT:60    VDT:30
       NORM-TH:50    FAST-TH:75      NORM-TIME:60   FAST-TIME:10
       Drx-pool:30   DRX-TOUT:3000   Vrx-pool:10    Vtx-pool:10   VTX-TOUT:500
       ------------------------------------------------------------------------
       SLINK:NONE
       ------------------------------------------------------------------------
       Pl:1   ST:RUNNING   LOWPO:102   SPEED:64000    DLCI:NONE   
              CIR:0        BC:0        BE:0           SC:4         CC:YES

PO:528 ------------------------------------------------------------------------
ML     LOG:DS        CRYPT:NO        CRKEY:DFT      T1:1000  T3:3000   N2:3   
       ROLE:MASTER   MAXBW:2400      MINDATABW:0             DDT:60    VDT:30  
       NORM-TH:50    FAST-TH:75      NORM-TIME:60   FAST-TIME:10   
       Drx-pool:30   DRX-TOUT:3000   Vrx-pool:10    Vtx-pool:10   VTX-TOUT:500 
       ------------------------------------------------------------------------
       SLINK:200      Chan:0                    CHAN-LIMIT:0   
                      CGI:*                     SGI:*    
                      CDI:*                     SDI:*    
       CDOMAXCONN:2   CGO:#                     SGO:#    
       CDONRTY:5      CDO:#                     SDO:#    
       ------------------------------------------------------------------------
       Pl:1   ST:RUNNING   LOWPO:102   SPEED:64000    DLCI:NONE   
              CIR:0        BC:0        BE:0           SC:4         CC:YES   

PO:529 ------------------------------------------------------------------------
ML     LOG:DS        CRYPT:NO        CRKEY:DFT      T1:1000  T3:3000   N2:3
       ROLE:MASTER   MAXBW:2400      MINDATABW:0             DDT:60    VDT:30
       NORM-TH:50    FAST-TH:75      NORM-TIME:60   FAST-TIME:10
       Drx-pool:30   DRX-TOUT:3000   Vrx-pool:10    Vtx-pool:10   VTX-TOUT:500
       ------------------------------------------------------------------------
       SLINK:200      Chan:0                    CHAN-LIMIT:0
                      CGI:*                     SGI:*
                      CDI:*                     SDI:*
       CDOMAXCONN:2   CGO:#                     SGO:#
       CDONRTY:5      CDO:#                     SDO:#
       ------------------------------------------------------------------------
                         *** NO PLINKs CONFIGURED ***

PO:530 ------------------------------------------------------------------------
ML     LOG:DS        CRYPT:NO        CRKEY:DFT      T1:1000  T3:3000   N2:3
       ROLE:MASTER   MAXBW:2400      MINDATABW:0             DDT:60    VDT:30
       NORM-TH:50    FAST-TH:75      NORM-TIME:60   FAST-TIME:10
       Drx-pool:30   DRX-TOUT:3000   Vrx-pool:10    Vtx-pool:10   VTX-TOUT:500
       ------------------------------------------------------------------------
       SLINK:NONE
       ------------------------------------------------------------------------
                         *** NO PLINKs CONFIGURED ***

Usually this parameter makes possible to activate/deactivate logging functionalities of meaningful events of the port as well as the detection and signalling of alarms in case of critical events.

The following table shows the available options and the related functionalities usable by the parameter:

Option	Meaning
D	Recording of the driver state changes and/or the meaningful events in Debug Log
S	Recording of the driver state changes and/or the meaningful events in the System Log
A	Periodic detection of possible alarms. The detected alarms can be displayed the command ALARM VIEW or by the analogous command available on the UTILITY of the LCD display on the front panel
L	On alarm detection, acoustic signal generation plus a message on the LCD display. This function depends on activation of alarms detection by the "A" option
T	Generation by the Agent SNMP of Abilis CPX of SNMP traps corresponding to any change of the driver state and/or occurring of meaningful events

Beside the already described options the following values are also allowed:

Option	Meaning
NO	It means that all the logging functionalities, alarms detection and generation, above mentioned, are disabled.
ALL	It means that all the logging functionalities, alarms detection and generation, above mentioned, are enabled.
+E	This option added to one or more of the previous ones, extends its (their) set of meaningful events. The value "ALL+E" activates all the options and extends the set of meaningful events. The value "NO+E" is meaningless so it is ignored.

Options can be combined together.

Some examples:

• setting "LOG:DS+E", activates the extended logging functions for Events Log and System Log
• setting "LOG:STA", activates the extended logging functions for System Log, SNMP traps generation and periodic detection of alarm states;

By using the characters "+" and "-" as prefix of one or more options is possible to add or delete one or more functionalities without setting from the scratch the value of the parameters.

Some examples:

• Suppose the current value of the parameter is "LOG:DSTA", by setting "LOG:-A", the periodic detection of eventual alarm states is removed, leaving unchanged all the remaining options; in such way the final value of the parameter will be "LOG:DST";
• Suppose the current value of the parameter is "LOG:ST", by setting "LOG:+DA", the logging function of the events on the Events Log and the periodic alarm detection are added to the already activated options; in such way the final value of the parameter will be "LOG:DSTA".

The changes made on this parameter are immediately activated, without the need of initialization commands.

It enables and selects the cryptography to be applied on the frames passing through the port. Cryptography can be selectively applied to the different traffic types (VOICE and DATA):

Value	Meaning
NO	No cryptography is applied.
DATA	Cryptography is applied only on DATA traffic type.
VOICE	Cryptography is applied only on VOICE traffic type.
ALL	Cryptography is always in use, whatever is the traffic data type.

It selects the key to be used for cryptography operations.

Users can choose either the default key supplied by the system ("CRKEY:DFT"), or one of the keys defined in the cryptography keys table, in which case the numeric value (from 1 to 63) corresponding to the desired CRKEY has to be specified.

If the configured value refers to a missing CRKEY it will be shown inside square brackets, e.g. "CRKEY:[5]" means that the key number 5 is not present in the table.

If the parameter CRYPT: is set to NO, the value of "CRKEY:" is useless.

Maximum time to wait for a Link-Check "probe" acknowledge. If this time elapses without receiving the acknowledge the "probe" is immediately repeated, as a result "not acknowldged probes" are repeated every T1 milliseconds.

This is the time interval between a correctly sent and acknowledged Link-Check "probe" and the next one to send while the link is regularly working (e.g. P-LINK state is READY). It has relationships with the parameter T1: and it has to satisfy the simple rule: T3 > T1 * 2.

Sets the maximum number of Link-Check "probes" retransmission.

If this counter runs over, it means "N2" Link-Check "probes" have been sent without receiving any acknowledge, the P-Link or S-Link channel is declared out of service.

In the case it occurs on the P-Link channel, the communication will be activated on the S-Link channel, providing that it is properly configured.

In the case it occurs with the S-Link channel, the connection is closed with the code 80 90 80 8B; if it happens three times consecutively the port will be placed in the "STOPPED2" state, without being able to receive or make further calls.

To recover from the error it is necessary to execute the INIT PO: command.

If alarm detection was enabled, i.e. if LOG is set with the "A" option, it is also possible to recover from the error with the ALARM RESET command or using the analogous menu available on the LCD display of the front panel.

If the communication cannot go on any longer either on P-Link or S-Link, the upper level driver will be advised of the error and point out a "Level 1 Down".

This parameter indicates the role of the ML. When ML is configured as a MASTER, it has the complete control on all its lower links. It can decide to open or close them following its throughput rules. When ML is configured al SLAVE, it has a reduced set of controls. It can only open one single S-LINK only when strictly needed.

MLs connected together cannot have the same role. In this case will be both automatically set to SLAVE.

It is the maximum bandwidth allowed to accross over ML links. If the bandwidth that is going on ML connection is higher that maximum, ML will no open other S-LINK.

it is the minumum bandwidth that must be left for DATA.

If MINDATABW is not set to 0, one link will be always open: will be opened a PLINK if at least one PLINK is configured and CONNECTED. Will be opened a S-LINK if no P-LINKS are configured or set to DOWN and at least there is a S-LINK present.

DDT is the time that ML uses to analyze the DATA throughput on the LINKs. When ML considers that for DDT seconds current throughput could be managed also without one SLINK, it starts the DATA procedure to close the SLINK.

ML closes the SLINK only when both DATA and VOICE procedures to close SLINK were started.

When the SLINK is closed, ML waits at least other DDT seconds before checking again for SLINK closure. This procedure is used by ML if at least one SLINK is open. See Bandwidth On Demand documentation for more deatails about rules used for DATA stream to detect when SLINK can be closed by ML.

VDT is the time that ML uses to analyze the VOICE throughput on the LINKs. When ML considers that for VDT seconds current throughput could be managed also without one SLINK, it starts the VOICE procedure to close the SLINK.

ML closes the SLINK only when both DATA and VOICE procedures to close SLINK were started.

When the SLINK is closed, ML waits at least other VDT seconds before checking again for SLINK closure. This procedure is used by ML if at least one SLINK is open. See Bandwidth On Demand documentation for more deatails about rules used for VOICE stream to detect when SLINK can be closed by ML.

This parameter indicates the threshold for opening an S-LINK after a certain amount of time. When the current throughput is higher than normal threshold, ML analises this situation for NORM-TIME: seconds. If after this period, threshold percentage is still higher than NORM-TH, then a new SLINK will be opened (if present and ready to be opened).

The percentage is not calculated using the total bandwidth of the currently opened links: it is calculated using the total bandwidth of the currently opened links LESS the REAL bandwidth used by voice frames.

It follows the same rules of NORM-TH:. The difference is that the period of time to wait before opening the link is indicated by FAST-TIME:

This is the period that ML has to analyze before opening an additional S-LINK channel when current data throughput is higher than NORM-TH:

This is the period that ML has to analyze before opening an additional S-LINK channel when current data throughput is higher than FAST-TH:

This is the amount of DATA frames (in Kbytes) that ML can handle when receiving from remote ML.

This parameter indicate when DATA frames hold in ML pool (DRX-POOL:) must be considered in time-out and then directly forwarded to higher layer. This situation could happen when previous frame was not yet arrived and ML was waiting for it before submitting next datagram to higher layer.

This is the amount of VOICE frames (in Kbytes) that ML can handle when receiving from remote ML.

This is the amount of VOICE frames (in Kbytes) that ML can handle when sending them remote ML. This is needed because could happen that several voice frames cannot be sent to a specific LINK because of, for example, this link went down. In this case, ML cannot stop the voice frame stream because other voice frames probably were sent on other working LINKs, so, only VOICE that cannot be temporally sent are stored into this pool.

This time-out is used when several voice frames are present in VOICE pool (see VTX-POOL:) and they were hold more than VTX-TOUT. This method is to avoid that once VOICE frames can be sent (because for example another link were opened), they are not too old for the remote side.

It defines the S-Link port of lower level, it can be of EIR or Q931 type.

If the S-Link port is not desired, the parameter has to be set to "NONE".

This parameter indicates how many SLINK channels are managed by ML.

This doesn't mean that can be always opened CHAN SLINKs. Also CHAN-LIMIT: must be considered.

Specify the maximum number of SLINK channels that can be opened by ML.

This parameter indicates how many SLINK channels can be opened using CDO number.

If ML needs to open a new SLINK (due to throughput, see NORM-TH: and FAST-TH:) and the number of SLINK opened using CDO: is the same of CDOMAXCONN, then no more SLINK will be opened, even if present in configuration.

It specifies the maximum number of call repetitions for the S-Link channel when the connection cannot be established. Once attempts are exhausted the S-Link chennel is place in STOPPED1 state.

If the channel is established BUT the "link-check protocol" detects link-check failure for three times consecutively the port is placed in STOPPED2 state regardless the NRTY counter.

Value	Meaning
0	Outgoing calls are disabled.
1-65534	Calls are repeated as many times as the value.
NOMAX	Calls are repeated indefinitely.

It sets up the calling address, that the incoming call must contain.

The character "*" means "any number".

It sets up the calling sub-address, that the incoming call must contain.

The character "*" means "any character".

It sets up the called address, that the incoming call must contain.

The character "*" means "any number".

It sets up the called sub-address, that the incoming call must contain.

The character "*" means "any character".

It sets up the calling number of the outgoing call.

The character "#" means "no number", if it is set, the outgoing call will not contain the calling address.

It sets up the calling sub-address of the outgoing call.

The character "#" means "no number", if it is set, the outgoing call will not contain the calling sub-address.

It sets up the called number of the outgoing call.

The character "#" means "no number", if it is set, the outgoing call will not contain the called address.

It sets up the called sub-address of the outgoing call.

The character "#" means "no number", if it is set, the outgoing call will not contain the called sub-address.

It identifies the PLINK configured in ML list. Can be considered as an index and it is used to access PLINK parameters.

Status of the PLINK configuration.

NEW: PLINK is added in ML configuration, but it is not yet operative (ML needs to be restarted).

DELETED: PLINK is removed from ML configuration, but it is yet present into ML resources, even if no more used (ML needs to be restarted to completely remove it from memory).

RUNNING: PLINK is present in configuration and working. This is the only status where ML can send/receive datagrams on this P-LINK.

It defines the P-Link port of the lower level, which can only be SYNC, FR, ISDN, PLINKE or EIR type.

If no P-Link port is required, the value "NONE" must be set.

This is the maximum bandwidth on the P-LINK. This field is very important because it is used when calculating throughput percentage (see NORM-TH: and FAST-TH:).

The parameter appears and can be modified only if the port referred by the parameter LOWPO: is an ISDN Basic Rate port type, i.e. the service provided by "only data" ISDN adaptors.

It defines the channel to be used on the lower level ISDN port.

The parameter appears and can be modified only if the PLINK referred is a FR port type.

It defines the identifier of the DLCI to use the lower lever FR port.

The value "NONE" means "no DLCI" and it disables the connection with the lower level FR port.

The validity of allowed values intervals for the DLCI identifier depends on the length of the header Frame-Relay in use:

Value	Meaning
NO	No cryptography is applied.
DATA	Cryptography is applied only on DATA traffic type.
VOICE	Cryptography is applied only on VOICE traffic type.
ALL	Cryptography is always in use, whatever is the traffic data type.

The parameter appears and can be modified only if the port referred by the parameter PL: is a FR port type.

It makes possible to apply or to not apply the throughput reduction as reaction to congestion notifications.

Not obeying to congestion notification may cause severe malfunctioning, therefore we strongly reccommend to always use CC:YES. Ignoring congestion notification may be needed for some testing activities, certainly not during the regular work.

The parameter appears and can be modified only if the port referred by the parameter PL: is a FR port type.

It sets how many consecutive frames with BECN=1 have to be received for reducing the throughput, according to the rule fixed by ANSI T1.618 annex A §2.1.1.

Value 4 suits the most frequent situations, however the right value can be evaluated by using the Calculator.

The parameter appears and can be modified only if the port referred by the parameter PL: is a FR port type.

It defines the value of "Committed Information Rate", i.e. the throughput the frame-relay network has to guarantee in normal working conditions. This throughput is measured in the time interval TC (Time Committed) given by the following formula: TC=BC/CIR.

The set up value must correspond to that one established by contract with the operator of the frame-relay network.

The parameter appears and can be modified only if the port referred by the parameter PL: is a FR port type.

It defines the "Burst Committed", i.e. the number of bits the network can accept, during the time interval TC, to guarantee the CIR.

If the network is congested, it sends a signal (BECN or FECN) that require the user to progressively reduce his throughput to values smaller than CIR.

The set up value must correspond to that one established by contract with the operator of the frame-relay network.

The appears and can be modified only if the port referred by the parameter PL: is a FR port type.

It defines the "Burst Excess", i.e. the number of bits in excess that the network can manage, during the time interval TC, if there is availability of exceeding resources. The "exceeding throughput" is evaluated by using the following formula ThExcess=BE*TC.

When the network does not have resources in excess sends a signal (BECN or FECN) that engages the user to immediately limit the throughput to the value of the CIR.

The set up value must correspond to that one established by contract with the operator of the frame-relay network.

This parameter indicates which Virtual Synchronous Port (VSP) of those defined in the TDM table the ML must use.

[17:09:33] ABILIS_CPX: D S PO:521

PO:521 ------------------------------------------------------------------------
ML     STATE:DOWN  PLINKs:ALL-DOWN   CHANs:STOPPED1 ROLE-Cur/Conf:MASTER/MASTER
                   Max-BW:0          Cur-BW:0              N-DOWN:1
       - Data: ---------|-------INPUT-------|-------OUTPUT------|-Thresholds--|
              Avail-BW: |0                  |0                  |             |
       NORM-Throughput: |         0/  0/ 50 |         0/  0/ 50 |0            |
       FAST-Throughput: |         0/  0/ 75 |         0/  0/ 75 |0            |
       - Voice: ------------------------------------|---INPUT----|--OUTPUT----|
       CHANs:0          BW:0            Throughput: | 0          | 0          |
       ------------------------------------------------------------------------
       PL:1    ST:CONNECTED  DN1:0                     DN2:0
       ------------------------------------------------------------------------
       MAX-RTY:0           CUR-RTY:0           DDT:18     VDT:30
       -----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
       FAIL-CALL  |          0|          0|SUCC-CALL  |          0|          0|
       TIME-CALL  |          0|          0|CUR-CALL   |          0|          0|
       ------------------------------------------------------------------------

[17:09:36] ABILIS_CPX: 

[17:10:47] ABILIS_CPX: d se po:521

PO:521 ------------------------------------------------------------------------
ML     --- Cleared 000:00:01:55 ago, on 03/04/2002 at 17:09:00 ----------------
       -----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
       CHR        |          0|          0|FRM        |          0|          0|
       CHR-D      |          0|          0|FRM-D      |          0|          0|
       CHR-V      |          0|          0|FRM-V      |          0|          0|
       CHR-C      |          0|          0|FRM-C      |          0|          0|
       LOST-D     |          0|           |BAD-FRM    |          0|          0|
       LOST-V     |          0|          0|CRYPTO-ERR |          0|          0|
       D-TOUT     |          0|           |D-OUT-SEQ  |          0|           |
       D-MISSING  |          0|           |D-RESYNC   |          0|           |
       ------------------------------------------------------------------------
       -----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
       FAIL-CALL  |          0|          0|SUCC-CALL  |          0|          0|
       TIME-CALL  |          0|          0|CUR-CALL   |          0|          0|
       ------------------------------------------------------------------------
       ------------------------------------------------------------------------
       PR CDO                  ST   SUCC-CALL  FAIL-CALL  TIME-CALL  CUR-CALL
       ------------------------------------------------------------------------
       1  12345                GOOD 3          2          10         500       

[17:10:55] ABILIS_CPX:

It shoes the current state of the ML port driver.

Driver	States	Meaning	Values shown in:
			System Log	Debug Log	Display LCD
ML	DOWN	Both PLINKs and CHANs states are DOWN			DN
	READY	Port is active			RD
	ERR	Software error, contact Abilis assistance.			NA

Indicates the global PLINK status. The information is the result of all the PLINKs configured in ML.

Value	Meaning
ALL-DOWN	All the PLINKs in ML are in DOWN state.
ALL-READY	All the PLINKs in ML are in DOWN state.
SOME-READY	At least one PLINK in ML is in READY state, the remaining PLINKs are DOWN.
ERR	Software error, contact Abilis assistance.

Indicates the status of SLINK channels.

Value	Meaning
STOPPED1	ML cannot make other outgoing calls on SLINK due to errors.
READY	ML can attempt to open a SLINK.
ERR	Software error, contact Abilis assistance.

Indicates the current ML ROLE and the value in the ROLE set in configuration. This information is useful because when both MLs are set as MASTER, they are automatically forced to SLAVE. In this way will be detected soon that a configuration error occurs.

Indicates the maximum bandwidth that ML could reach if ALL its LINKs were open. In order to have more bandwidth will be necessary to increase the number of LINKS.

Indicates the current bandwidth available in ML. This information is calculated making a sum of the bandwith of all the LINKS currently open.

This statistic indicates how many times the ML state went DOWN. The DOWN state is reached when ALL PLINKs configured are DOWN and when SLINKs cannot be opened.

Indicates the available bandwidth for DATA throughput. It is calculated making the difference between the Cur-BW and the sum of the theoretical throughput of all the VOICE frames (BW:).

This table row indicates several things. 3 columns are present: the first and the second column contain the information about current data throughput and thresholds percentage. The first field has the current throughput of DATA frames. Throughput is calculated making an average of the DATA throughput on the last NORM-TIME seconds and the available bandwidth (Avail-BW). The second field is the percentage of the DATA throughput previously described. This percentage is calculated on the available data bandwidth. The third field contains the configured normal threshold NORM-TH. In the third column there is the threshold information: it indicates how many time the percentage calculated on data throughput was greated than normal threshold configured NORM-TH.

This row contains similar informations to NORM-Throuhput. The difference is that throughput is calculated on last FAST-TM seconds, and the percentage threshold is FAST-TH.

Indicates the number of voice channels that are currently opened by upper layer. ML detects the number of opened channels analizing the informations present in voice frames.

A distinction must be done about theoretical and real throughput. To calculate real throughput, ML analyses every second the amount of BITs sent/received on VOICE frames. About theoretical throughput, it is the result of the sum of the bandwidth declared by upper layer when opening VOICE channel.

To calculate real throughput, ML analyses every second the amount of BITs sent/received on VOICE frames. The result will be a value expressed in bits per seconds..

It indicates for which PLINK the informations on this row are referred to.

Indicates the current status of the PLINK.

Indicates how many times this PLINK went in DOWN1 state.

Indicates how many times this PLINK went in DOWN2 state.

It indicates the RTY parameter set in ML configuration. In this way will be made a fast comparison with current retries (CUR-RTY).

It indicates the current number of retries attempted by ML in order to open a SLINK.

This parameter indicates the time elapsed when ML has started to analyse throughput of DATA frames. For more informations see DDT:

This parameter indicates the time elapsed when ML has started to analyse throughput of VOICE channels. For more informations see VDT:

Indicates the number of times the ML tried to open a SLINK but it cannot.

Indicates the number of times that ML opened a SLINK successfully.

Indicates the sum of seconds that every SLINK was connected from REBOOT or from ML RESTART (or when statistics were cleared). This statistic make a distinction about incoming and outgoing calls and takes care also of the SLINK currently connected.

Indicates the sum of seconds of the current opened SLINKs.

The counter CHR (INPUT) is incremented every time a frame is received. The counter CHR (OUTPUT) is incremented every time a frame is sent.

The counter FRM (INPUT) is incremented every time a frame is received. The counter FRM (OUTPUT) is incremented every time a frame is sent.

The counter CHR-D (INPUT) is incremented every time a DATA frame is received. The counter CHR-D (OUTPUT) is incremented every time a DATA frame is sent.

The counter CHR-C (INPUT) is incremented every time a Link-Check frame is received. The counter CHR-C (OUTPUT) is incremented every time a Link-Check frame is sent.

The counter CHR-V (INPUT) is incremented every time a VOICE frame is received. The counter CHR-V (OUTPUT) is incremented every time a VOICE frame is sent.

The counter FRM-D (INPUT) is incremented every time a DATA frame is received. The counter FRM-D (OUTPUT) is incremented every time a DATA frame is sent.

The counter FRM-C (INPUT) is incremented every time a Link-Check frame is received. The counter FRM-C (OUTPUT) is incremented every time a Link-Check frame is sent.

The counter FRM-V (INPUT) is incremented every time a VOICE frame is received. The counter FRM-V (OUTPUT) is incremented every time a VOICE frame is sent.

The counter LONG-D (INPUT) is incremented every time a DATA frame is discarded because there are no available receiving buffers.

Number of frames received in a bad format.

The counter LONG-V (INPUT) is incremented every time a VOICE frame is discarded because there are no available receiving buffers.

Input: Number of received frames discarded due to bad ciphering or missing cipher key.

Output: Number of sending frames discarded due to missing cipher key.

Is used to indicate how many times the receiver DATA buffer gone in time-out due to missing DATA frame.

Number of out-of-sequence DATA frames received.

Number of datagram lost due to re-sequence of DATA frames.

Number of resincronisation requests.

Indicates the priority of this CDO number. Lower is the number, higher is the priority.

Indicates the called number of the outgoing call.

Indicate the status of CDO number. If GOOD, this number can be used for outgoing calls. If STOP, this number will no more used for calling until an INIT or a RESTART of ML port.

Value	Meaning
STOP	ML will use no more this number for calling until an INIT or a RESTART.
READY	This CDO number can be used by ML for outgoing calls.
ERR	Software error, contact Abilis assistance.

Indicates the number of times that ML opened a SLINK successfully.

Indicates the number of times the ML tried to open a SLINK with this CDO number, but it cannot.

Indicates the sum of seconds that this CDO number used by a SLINK establish a connection from REBOOT or from ML RESTART (or when statistics were cleared). This statistic indicates only outgoing calls and takes care also of the SLINK currently connected.

Indicates the sum of seconds of the current opened SLINKs by CDO number.

This variable stores the CPX port number, which the SNMP trap refers to.

This variable reports either the port type which the trap refers to (in this case it will be ML) and the description that eventually the user can give to the CPX port.

This variable reports the current value of the global P-Link channels state.

SNMP variable value	Corresponding Global P-Link channels state
all-down(0)	ALL-DOWN
all-ready(1)	ALL-READY
some-ready(2)	SOME-READY

This variable reports the current value of the global S-Link channels state.

SNMP variable value	Corresponding Global S-Link channels state
stopped1(0)	STOPPED1
ready(1)	READY

This variable reports the P-Link channel identifier for which the trap is generated.

This variable reports the current state of the P-Link channel, which the trap refers to. The following table shows the relationship between the state values, referred by the SNMP variables, and the states carried out by executing the command D S.

SNMP variable value	Corresponding P-Link channel state
none(0)	NONE
link-np(1)	LINK-NP
link-err(2)	LINK-ERR
down1(3)	DOWN1
down2(4)	DOWN2
ready(5)	READY
listening(6)	LISTENING
called(7)	CALLED
calling(8)	CALLING
connected(9)	CONNECTED, CONN-TO, CONN-FROM
clearing(10)	CLEARING
cleared(11)	CLEARED
undefined(12)	UNDEFINED

This variable reports the elapsed time (in cents of second) since the occurred event, which has generated the SNMP, started the system. This value is usually shown by using the format days:hours:minutes:seconds.