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Issue 1.0, October 2012 1 1 - 3 1
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Feature 71, “4ESS Switch Generics 4E14(R4) - 4E18(R1) Support”
Purpose
This feature allows network traffic managers to take advantage of the increased network management capabilities provided in the 4E14, Release 4, through 4E18, Release 1, generics of the 4ESS Switch. New Common Channel Signaling No 7 (CCS7) surveillance data benefits the network traffic managers in their understanding of the signaling network.
Modifications to the interface between NTM and the 4ESS Switch provides surveillance data on the expanded 4-digit Feature Group D (FGD) Carrier Identification Code (CIC).
This allows network traffic managers to track traffic being carried by FGD carriers who have been assigned the Federal Communications Commission mandated four digit CIC.
New reroute and manual Trunk Subgroup (TSG) control enhancements gives the network traffic managers finer control over traffic in the network. Alerting of potential
administrative errors that result in calls being “vacant coded” is provided. Enhancements in the performance of the interface were made to speed the acquisition of important data as well as providing a simplified means of selecting TSGs for surveillance purposes.
The 4ESS Generics supported by this feature offer the following network traffic management features.
Interface and administrative enhancements
Modifications to Interface Protocol [a 4E16 feature]
NTM supports the transport of the switch's 5-minute “regular type” data in subblocks of 2046 bytes (as opposed to the current 498 byte subblocks). This new increased subblock size speeds the transfer of data and significantly improves the interface's performance.
Modifications to Data Collection [a 4E16 feature]
Currently the Service Circuit Status, Final Handling Code, and Service Degrading data are
“demand type” data, i.e. available from the switch upon request from NTM but only after all the “regular type” data has been collected. Due to the potentially critical nature of this data, it is desirable to make the data available as soon as possible. Therefore, the interface has been changed to make this data “regular type” data to speed the availability of the information to the network traffic managers.
Trunk Subgroup Interest List [a 4E17 feature]
This capability provides a mechanism for assigning TSGs to Adjunct Head Cells (AHCs) without using the Study Class mechanism that is manually intensive and prone to error.
NTM maintains a “TSG Interest List” of all the trunk subgroups the network traffic manager wants data collected on. This list can be updated as needed to reflect changing
surveillance needs. Once transmitted to the switch, the switch automatically assigns AHCs and begins collecting data on the specified trunk subgroups. The 4ESS Switch's Network Management Display System (NMDS) continues to support Study Class assignments as a backup procedure.
NTM control enhancements
Numbering Plan Area (NPA) Prefix for Rerouted Calls [a 4E16 feature]
Typically, routing within an NPA requires only a 7-digit routing number. When calls are rerouted within an NPA the “reroute from” switch only needs to forward the 7-digit routing number to the “reroute to” switch for the call to be properly routed to completion.
There may be instances, however, where the “reroute to” switch needs to receive the NPA along with the 7-digit intra-NPA routing number in order to properly process the call. This may happen when attempting to reroute Advanced Intelligent Network (AIN) or other
“special service” calls to a switching node capable of further processing the call.
Regular, Code Specific, and Routing Data Block Index (RDBI) Specific Reroute Controls
NTM supports modifications to the Regular, Code Specific, and Routing Data Block Index (RDBI) Specific Reroute Controls so that the network traffic manager can require the 4ESS Switch to prefix an NPA to the seven digit routing number for calls being rerouted within the same NPA. The valid digit combinations on which a 4ESS Switch can activate a Code Specific Reroute control remain unchanged, while, for all three reroute types, if an NPA is specified, only six via trunk subgroups can be selected by the network traffic manager.
4ESS Reroute Control Capacity [a 4E16 feature]
NTM supports the new 4ESS Switch limits on the number of reroute controls allowed per switch. The number of regular reroutes allowed per 4ESS Switch is 128, and the total number of Code Specific or RDBI Specific reroutes, combined, is 64.
Additional Traffic Option for Manual Outgoing TSG Controls [a 4E17 feature]
NTM supports the switch capability that allows a network traffic manager to specify
“direct routed traffic only” as a control option for the Cancel-To (CANT), Cancel-From (CANF), and SKIP manual TSG controls. This now allows the network traffic manager to selectively control direct routed (only), alternate routed (only), or all traffic on the TSG.
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Issue 1.0, October 2012 1 1 - 3 3
New and enhanced surveillance data
“Ten Worst” Vacant Code Occurrence Alerting [a 4E14(R4) feature]
NTM supports an alerting discrete from the switch that indicates the availability of a “Ten Worst Vacant Code Analysis Report”. This report contains the following failure types, some of which may indicate possible administrative errors in the switch's database:
1. Vacant Code 2. Digit Count
3. Miscellaneous Failure
4. Miscellaneous Automatic Message Accounting (AMA) 5. Unauthorized Centralized AMA (CAMA)
6. Fraud Prevention
7. Number Substitution Failure
Once alerted, it would be the network traffic manager's responsibility to contact personnel at an appropriate work center whose job it would be to demand the report from the switch, analyze the report's contents to determine if an administrative error is causing calls to be killed, and to take corrective action. It would be the joint responsibility of the network traffic managers and the appropriate work center personnel to set the “Initial Screening Threshold” and the “Report Printout Threshold” in the switch to prevent an inordinate number of “false alarms” from being generated.
Additional 4ESS Switch CCS7 Data [a 4E17 feature]
NTM supports the additional CCS7 discretes, TSG flag, and 5-minute measurements generated by the 4ESS switch, to help the network traffic managers understand abnormalities in the signaling network.
Discretes
Five new 30-second discretes are provided on the Graphical User Interface (GUI) and via the discrete (DSC) command:
1. Operations — ISDN User Part (ISUP) Incoming Overload 2. Office Link Failure — ISUP signaling
3. Combined Link Set Failure — ISUP signaling 4. Common Network Interface (CNI) No Trunk Hunt 5. CNI Ring Failure
The description of five existing discretes is changed to clarify their meaning in a CCS7 environment:
1. PRO — CCS7 ISUP User Failure 2. DTP — CCS7 Signaling Failure
3. GSC — CCS7 Signaling Congestion (Transfer Controlled) 4. DSM — CCS7 Direct Signaling Message (DSM) Failure 5. LNKFL — CCS7 Declared Link Failure
New Total Office 5-minute data are provided:
1. ISUP Continuity Check (COT) Message Timeout Peg Count 2. ISUP Address Complete Message (ACM) Timeout Peg Count 3. CNI Ring Failure Peg Count
4. Duration of CNI Ring Failure (in seconds)
One new 5-minute TSG flag is added and the description of two flags are modified:
1. CCS7 ISUP User Failure flag (new) 2. CCS7 ISUP Signaling Congestion (TFC) 3. CCS7 ISUP Signaling Failure
Automatic Congestion Control (ACC) Monitoring [a 4E17 feature]
Four new 5-minute Total Office counts are introduced to monitor the operation of the ISUP ACC NTM control:
1. ISUP ACC Level 1 (CL1) Peg Count 2. ISUP ACC Level 2 (CL2) Peg Count
3. Duration Time in ISUP ACC CL1 (in seconds) 4. Duration Time in ISUP ACC CL2 (in seconds)
4-Digit Feature Group “D” Carrier Identification Code [a 4E18(R1) feature]
NTM supports the 4ESS Switch capability to detail, on demand, the specifics of active Manual Call Gapping Controls containing a 4-digit FGD CIC. The detailed information contains the 4-digit CIC and up to 8 digits of the controlled routing number.
In addition, NTM supports the regular collection of Manual Call Gapping Control surveillance data [Attempts Count and Cut Thru (Success) Count] for those Manual Call Gapping Controls that have been placed on a 4-digit FGD CIC and up to 8 routing digits.
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Alcatel-Lucent - Proprietary See notice on first page.
Issue 1.0, October 2012 1 1 - 3 5
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