Each Signaling MTP2 Protocol Profile object is a child of the Signaling Gateway object.
Each Signaling Link has associated with it a Signaling MTP2 Protocol Profile. The Signaling MTP2 Protocol Profile defines the layer 2 signaling transport characteristics of the signaling link with which it is associated. Each Signaling MTP2 Protocol Profile can be associated to multiple Signaling Links. A Signaling MTP2 Protocol Profile can be deleted only when it is not associated with any Signaling Links.
A default Signaling MTP2 Protocol Profile named "Default" is supplied with the MetaSwitch VP3000. The default profile should be suitable for most applications.
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The default profile is read-only; you cannot delete, modify, or disable it. If you want to use different values, you must create a new Signaling MTP2 Protocol Profile and change the Signaling Link to specify the new profile name. |
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Parameter |
Access |
Description |
Profile name | Change | Unique user-friendly name identifying the Signaling MTP2 Protocol Profile. Specify a name of up to 30 characters. If a name is not specified, the EMS displays a default. |
Error correction method | Change Inactive | Specifies the type of error-correction the signaling link is using. Values:
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Transmission rate | Change Inactive | The transmission rate of the signaling link. Values:
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MTP2 timer T1 | Change Inactive | ITU Q.703 timer T1. Alignment ready. Range: 12900 - 50000ms. No default is configured for this field because the valid ranges for ANSI and ITU are incompatible. (For ANSI, the valid range is 12900 - 16000ms and the default is 13000ms.) (For ITU, the valid range for 64kb/s links is 40000 - 50000ms and no default is specified.) |
MTP2 timer T2 | Change Inactive | ITU Q.703 timer T2. Not aligned. Range: 5000 - 150000ms. The default is 15000ms. (For ANSI, the valid range is 5000 - 30000ms and the default is 11500ms.) (For ITU, the valid range is 5000 - 150000ms and no default is specified.) |
MTP2 timer T3 | Change Inactive | ITU Q.703 timer T3. Aligned. Range: 1000 - 14000ms. (For ANSI, the valid range is 5000 - 14000ms and the default is 11500ms.) (For ITU, the valid range is 1000 - 2000ms and no default is specified.) |
MTP2 timer T4e | Change Inactive | ITU Q.703 timer T4E. Proving period timer emergency. Range: 400 - 660ms. (For ANSI, the valid range is 540 - 660ms and the default is 600ms.) (For ITU, the valid range for 64kb/s links is 400 - 600ms and the default is 500ms.) |
MTP2 timer T4n | Change Inactive | ITU Q.703 timer T4N. Proving period timer normal. Range: 2070 - 9500ms. (For ANSI, the valid range is 2070 - 2530ms and the default is 2300ms.) (For ITU, the valid range for 64kb/s links is 7500 - 9500ms and the default is 8200ms.) |
MTP2 timer T5 | Change Inactive | ITU Q.703 timer T5. Sending SIB. Range: 80 - 120ms (for both ANSI and ITU). The default is 100ms. |
MTP2 timer T6 | Change Inactive | ITU Q.703 timer T6. Remote congestion. Range: 1000 - 6000ms. The default is 4000ms. (For ANSI, the valid range is 1000 - 6000ms.) (For ITU, the valid range is 3000 - 6000ms.) |
MTP2 timer T7 | Change Inactive | ITU Q.703 timer T7. Excessive delay of acknowledgement (delay to avoid message mis-sequence on changeover). Range: 500 - 2000ms (for both ANSI and ITU). The default is 1500ms. |
Loop delay | Change Inactive | Loop delay (i.e. the time between the sending of a message signal unit and the reception of the acknowledgement for this message signal unit in undisturbed operation). Range: 0 - 6000ms. The default is 100ms. |
Congestion onset (level 1) | Change Inactive | The meaning of this field varies depending on the Congestion control method used by the Signaling Gateway. If the Congestion control method is International, the link is congested if the number of MSUs in the transmission / retransmission buffer of a link exceeds this value. If the Congestion control method is National (priority levels) or National (buffer), the link is congested at Congestion Level 1 if the number of MSUs in the transmission / retransmission buffer of a link exceeds this value. If the Congestion control method is National (timer), this is the congestion onset threshold as described in 3.8.2.3/Q.704. The default is 127. |
Congestion abatement (level 1) | Change Inactive | The meaning of this field varies depending on the Congestion control method used by the Signaling Gateway. If the Congestion control method is International, National (priority levels) or National (buffer), the link returns to an uncongested state if the number of MSUs in the transmission / retransmission buffer of a congested link becomes less than this number. This value must be less than the value for Congestion onset (level 1). If the Congestion control method is National (timer), this is the congestion abatement threshold as described in 3.8.2.3/Q.704. The default is 120. |
Overall congestion discard level | Change Inactive | If the number of MSUs in the transmission / retransmission buffer of a link exceeds this value, any new messages sent to the link for transmission are discarded. If the Congestion control method is International or National (timer), this value must be greater than the value for Congestion onset (level 1).If the Congestion control method is National (priority levels) or National (buffer), this value must be greater than the value for Congestion onset (level 3). The default is 149. |
Congestion onset (level 2) | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (priority levels) or National (buffer). If the number of MSUs in the transmission / retransmission buffer of a link exceeds this value, the link is congested at Congestion Level 2. The default is 133. |
Congestion abatement (level 2) | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (priority levels) or National (buffer). If the number of MSUs in the transmission / retransmission buffer of a link at Congestion Level 2 becomes less than this number, the link returns to Congestion Level 1. This value must be less than the value for congestion onset (level 2). The default is 130. |
Congestion onset (level 3) | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (priority levels) or National (buffer). If the number of MSUs in the transmission / retransmission buffer of a link exceeds this value, the link is congested at Congestion Level 3. The default is 139. |
Congestion abatement (level 3) | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (priority levels) or National (buffer). If the number of MSUs in the transmission / retransmission buffer of a link at Congestion Level 3 becomes less than this number, the link returns to Congestion Level 2. This value must be less than the value for congestion onset (level 3). The default is 136. |
Congestion discard (level 1) | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (priority levels). If the number of MSUs in the transmission / retransmission buffer of a link exceeds this number, MSUs with priority less than 1 are discarded. This value must be greater than the value for congestion onset (level 1). The default is 130. |
Congestion discard (level 2) | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (priority levels). If the number of MSUs in the transmission / retransmission buffer of a link exceeds this number, MSUs with priority less than 2 are discarded. This value must be greater than the value for congestion onset (level 2). The default is 136. |
Congestion discard (level 3) | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (priority levels). If the number of MSUs in the transmission / retransmission buffer of a link exceeds this number, MSUs with priority less than 3 are discarded. This value must be greater than the value for congestion onset (level 3). The default is 145. |
MTP2 timer Tx | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (timed). Tx timer value for the 'multiple link congestion states without congestion priority' mechanism as described in 3.8.2.3/Q.704. Units are ms. The default is 3000ms. |
MTP2 timer Ty | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (timed). Tx timer value for the 'multiple link congestion states without congestion priority' mechanism as described in 3.8.2.3/Q.704. Units are ms. The default is 3000ms. |
Initial congestion level | Change Inactive | This field is valid only if the Congestion control method of the Signaling Gateway is National (timed). Initial level of congestion. Range: 1 - 3. The default is 3. |
Max retransmission MSUs | Change Inactive | Maximum number of MSUs which are available for retransmission (name in Q.703:N1). Range: 0 - 127. The default is 127. |
Max retransmission octets | Change Inactive | Maximum number of octets that are available for retransmission (Q.703: N2). Range: 0 - 34671. The default is 25400. |
Max incoming unprocessed MSUs | Change Inactive | Maximum number of unprocessed incoming MSUs that may be held by the underlying device at any one time. Range: 0 - 100. The default is 25. |
Receive congestion onset threshold | Change Inactive | If the number of MSUs in the reception buffer exceeds this value, Level 2 flow control measures begin. MSUs are still accepted. The default is 125. |
Receive congestion abatement threshold | Change Inactive | If the number of MSUs in the reception buffer becomes less than this number, Level 2 flow control measures end. This value must be smaller than the receive congestion onset threshold. The default is 123. |
Max proving attempts | Change Inactive | Maximum number of failed proving attempts before the link returns to the Out of Service state. This is the Q703 AERM M parameter. This must be greater than zero. The default is 5. |
In service monitor type | Change Inactive | Type of monitor to use while in the In Service state. Typically this is the SUERM for lower speed links and the EIM for higher speed links. Values:
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MTP2 AERM Tin | Change Inactive | Q703 AERM Tin parameter. Normal-mode threshold of the (AERM) counter. This must be greater than the AERM Tie value. The default is 4. |
MTP2 AERM Tie | Change Inactive | Q703 AERM Tie parameter. Emergency-mode threshold of the (AERM) counter. This must be greater than zero. The default is 1. |
MTP2 AERM Tn | Change Inactive | Q703 AERM N parameter. The number of octets that causes an increment of the AERM counter while in "octet counting" mode. The default is 16. |
MTP2 SUERM T | Change Inactive | Q703 SUERM T parameter. Threshold of the SUERM counter. The default is 64. |
MTP2 SUERM D | Change Inactive | Q703 SUERM D parameter. Number of octets received for each decrement of the SUERM counter. The default is 256. |
MTP2 SUERM N | Change Inactive | Q703 SUERM N parameter. The number of octets that causes an increment of the SUERM counter while in "octet counting" mode. The default is 16. |
MTP2 EIM TE | Change Inactive | Q703 EIM TE parameter. Threshold of the EIM counter. This must be greater than EIM UE value. The default is 577169. |
MTP2 EIM T8 | Change Inactive | Q703 EIM T8 parameter. Monitoring interval, in ms, between each adjustment of the EIM counter. The default is 100. |
MTP2 EIM UE | Change Inactive | Q703 EIM UE parameter. Increment of the EIM counter after each interval in which an error occurred. This must be greater than the EIM DE value. The default is 144292. |
MTP2 EIM DE | Change Inactive | Q703 EIM DE parameter. Decrement of the EIM counter after each interval in which no error occurred. The default is 9308. |
Requested status | Read only | Specifies whether an administrator has attempted to enable the Signaling MTP2 Protocol Profile. Values:
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Actual status | Read only | Specifies the current status of the Signaling MTP2 Protocol Profile. Values:
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