Ameritech Call Control


General Information

Ameritech Call Control (ACC) is an Advanced Intelligent Network (AIN) feature that provides a customer the ability to screen outgoing calls from their telephone line.  ACC screening allows outgoing calls to be completed or rejected.  The customer has the ability to restrict calls based on the number dialed, coupled with the time-of-day (TOD), day-of-week (DOW), or day-of-year (DOY).

The customer may activate or deactivate ACC either manually or automatically during specific time periods.  The customer may modify the parameters through the use of a DTMF (Touch-Tone) telephone.  ACC also allows the customer to dial an override code during an interactive announcement to override all call restrictions.

AIN Elements

The AIN feature is designed to allow Ameritech/SBC to develop new services for customers without going through the process of having the switch vendors developing new feature packages.  Typically, switch vendors require 18-24 months to develop new services.  Then all switches require the new software load.  AIN allows Ameritech/SBC to greatly reduce the time necessary to bring new products to our customers.

Service Control Point (SCP) is the AIN database that provides for how the SCP should proceed with an AIN call.  By keeping the database in the SCP, there is no need to duplicate the information in each end office.

Service Switching Points (SSP) are switching offices that are equipped with the hardware and software to handle Signaling System 7 (SS7) trunk signaling and recognize AIN triggers.  The SSP sends queries to a SCP and processes responses from the SCP that control how the SSP should proceed with an AIN call.

Service Management Systems (SMS) is an operations system for creating and managing AIN services.  Customers access SMS by a PC or from a DTMF telephone to modify their parameters in the SCP.

There are two releases of AIN software.  They are called AIN Release 0.0 and AIN Release 0.1.  The SSP may have both releases working simultaneously providing different services.  ACC uses AIN Release 0.1 only.

Service / Feature Operation

The screening of outgoing calls is divided into three subsets: 1. The allow list - dialed numbers to be allowed.  2. The reject list - dialed numbers to be restricted.  3. All other numbers not on the allow or reject list.

The screening list can be set up to allow/restrict all outgoing calls except to certain specified numbers, area codes, or local prefixes.  Entries on the screening list can reflect any single number or combination of numbers representing long distance or local calls.

If the network determines that a call is to be restricted, the calling party will receive an interactive announcement.  The customer (or authorized user) can override this rejection through the use of an override code.  This override code is customer changeable through a DTMF telephone.

Customers have the opportunity to utilize the screening function in the way that best serves their needs.  All calls, except 911, can be restricted.  All operator assisted calls (0+, 0-, 00+, 00-) can either be allowed or rejected.  ACC will not be offered where 911 is not available.

The standard menu blocking choices include:

A customer gains access to the Interactive Voice Response (IVR) unit from their telephone by dialing *95.  The IVR unit interacts with the AIN SMS to allow the customer to change or modify their screening list.  If the customer wishes to modify their screening list remotely, (i.e. from some telephone other than the line which has the ACC service), the customer must dial a 7 or 10 digit number and follow the prompts.

Triggers

Triggering is the process of identifying an AIN call to the SSP.  A trigger provides an indication of the SSP to suspend normal call processing and launch a query to the SCP.

Trigger types for AIN Release 0.1 are:

  1. Off-Hook Immediate
  2. Off-Hook Delay
  3. Shared Interoffice Trunk
  4. 3 / 6 / 10 Digit Public Office Dialing Plan
  5. N11
  6. Customized Dialing Plan
  7. Automatic Flexible Routing
  8. Termination Attempt

The Off-Hook Delay trigger is used for ACC services on POTS classes of lines.

Maintenance

This document mentions the following switching centers; Field Dispatch Center (FDC), Switching Technology Center (STC), and Centralized Translations Group (CTG).  If these centers are not yet established, assume the Switching Control Center (SCC) will perform most of the functions of these new centers.

The Maintenance Center (MC) or Receipt/Screen (RTS) Center will refer ACC trouble reports to the appropriate FDC for analysis.  Work and Force Administration (WFA) and Loop Maintenance Operating System (LMOS) should be used where possible for referring trouble reports.

If the FDC determines the problem is not in the SSP, then the trouble report is referred to the Intelligent Network Administration Center (INAC) at (312) 424-2070.  If the INAC can find nothing wrong, they will request the FDC to contact their next tier of support.  The next tier of support for the FDC is the STC for the specific central office type.

Provisioning

The CTG, the INAC, and the Recent Change Memory Administration Center (RCMAC) groups are responsible for provisioning ACC service.

Notice: Translation Change Notice (TCN) / Mechanized Translation System (MTS), is also responsible for establishing the necessary initial translations to provide AIN Release 0.1 capabilities.

RCMAC will assign the Off-Hook Delay trigger to the customer's line from the service order.  The balance of the translations are provisioned at the INAC.  The INAC work must be completed before RCMAC adds the trigger to the line translations.  Failure to do so will result in all outgoing call attempts (except 911) being routed to an announcement.

The CTG must define an escape trigger for code 911.  The purpose of the escape trigger is to tell the SSP not to send a query to the SCP when dialing certain digits.  This allows the 911 call to route normally.  Code 911 must be defined as an escape code to prevent a customer from rejecting the 911 code.  The escape trigger also prevents code 911 from being routed to an announcement if the RCMAC work is done first in error.

AIN Announcements

There are 255 AIN Release 0.1 specific announcements possible.  These announcements are standardized throughout all switch types.  The SCP directs the switch via ID numbers to which announcement to play.

ACC service uses announcement IDs #3, #8, and #13.  The announcement phrases are as follows:

EWSD and #5 ESS

The AIN Release 0.1 planners provided the Siemens EWSD and the Lucent #5 ESS vendors with phrase lists necessary for the announcements.  The AIN Release 0.1 announcement phrases are provided for the #5 ESS and EWSD with the AIN Release 0.1 announcement hardware.  Translations are used to combine the phrases info complete announcements.  The CTG provided these translations when AIN Release 0.1 capability was established.

DMS-100

The phrase lists were not provided for the Nortel DMS-100.  The central office personnel must record the announcements on specific DRAMS provided for the AIN Release 0.1 service in the DMS-100 switches.  CTG provided the assignments for these announcements when establishing AIN Release 0.1 capability.

AIN Translations

The translation material that follows for each switch type is for general information only.  This information is intended only to be a guideline to aid the FDC and STC in trouble-shooting ACC problems.

AIN Release 0.1 features are available with the following software releases:

AIN Release 0.1 uses the SS7 network to launch queries to the SCP database.  The Global Title Translation (GTT) Number is 248 and the SubSystem Number (SSN) is 248.  The GTT and SSN must be assigned and activated before AIN Release 0.1 features can be used.  These translations should be completed when the AIN Release 0.1 feature package is loaded.

The feature code *95 will be translated in each SSP end office to a number that routes to the IVR located in Elgin, Illinois.

Lucent #5 ESS Translations

The escape trigger for the emergency code 911 must be entered in the Recent Change/View 9.3 Local Digit (Office Dialing).  Field 20 (ESC CODE) must be marked "Y" for all necessary LDITs.

Nortel DMS-100 Translations

The table TRIGESC must have the emergency code 911 defined as an escape code.

Nortel DMS-100 Workarounds

The DMS-100 does not fully support AIN Release 0.1 when interacting with all possible agents.  Basic Rate ISDN (BRI) is not supported with ACC service.

Primary Rate ISDN (PRI) trunk groups are looped back-to-back at the DSX bay to provide the work around.  A loop-around outgoing and a loop-around incoming trunk group is used on a office wide basis for various AIN Release 0.1 services.

The Circuit Administration Center (CAC) issues message trunk orders to establish the PRI loop-around trunk groups.  This allows the traffic peg counts of PRI loop-around trunks to be tracked like other message trunks.  CAC will issue additional message trunk orders when overflows are detected on the PRI groups.

The following tables will have PRI trunk datafill information: CLLI, TRKGRP, TRKSGRP, TRKMEM, LTDEF, LTDATA, LTCALLS, and LTMAP.

Table TRKSGRP must be set up as "Network" for the loop-around outgoing group and as "User" for the loop-around incoming group.



Siemens EWSD Translations

An escape trigger must be entered against the emergency code 911 using the Enter Intelligent Network message (ENTRIN).

Vendor Documentation for AIN Release 0.1

Line Translations

The following are examples of the Off-Hook Delay trigger programmed against an EWSD, DMS-100, and #5 ESS line.

For the Siemens EWSD, the OHDTRIG Class-of-Service (COS) is added.


DISPSUB:DN=3332135;

NPA = 815          DN = 3332135     EQN = 30- 1- 5- 6  MASKNO:03800
                  CAT = MS                             MASKNO:03774
		  LTT = COSLAC5                        MASKNO:03789
                LNATT = DTMF                           MASKNO:03787
		   CT = VI                             MASKNO:04396
                 CFRC = 3                              MASKNO:03798
		ORIG1 = 1
		  PIC = 2222                           MASKNO:04398
		  DIV = ACTCFBL -3332136               MASKNO:03780
		      & ACTCFDA -3332136
		      & CFBL
		      & CFDA

INTERRUPTION TEXT JOB 3372

CONTINUATION TEXT 0001

ASILB/APS11PS0202/USJCBL4N0010000/010
3372         O&MADM02/AINTST       2816/03800

                      & CFV
		      & UPCFVDN
		      & NOCFIND
		      & RRNG
		      & CCAREQ
                 CHRG = FRSA1                          MASKNO:03775
		  COS = TWC     &CW   &OHDTRIG         MASKNO:03777
               ADDINF = CLASS                          MASKNO:03772
	          ABB = SPD8
                      & UPSPD8

END JOB 3372 EXEC'D


For the Nortel DMS-100, the option is added for AIN OHDTRIG using SERVORD.


>qdn 4422135

DN:     4422135
TYPE:   SINGLE PARTY LINE
SNPA:   708   SIG: DT    LNATTIDX: 0
LINE EQUIPMENT NUMBER: HOST 00 0 13 10
LINE CLASS CODE: 1FR
IBN TYPE: STATION
CUSTGRP: POTSDATA    SUBGRP: 0   NCOS: 0
LINE TREATMENT GROUP: 0
CARDCODE: 6X17AC     GND: N    PADGRP: STDLN    BNV: NL   MNO: N
PM NODE NUMBER: 18
PM TERMINAL NUMBER: 427
CFW INDEX: N/A
OPTIONS:
CWT 3WC DGT PIC 288 Y SC1 CFW C NSCR 10 I 1312342212 AIN OHDTRIG
RES OPTIONS:
CNDB NOAMA ACB NOAMA

>

For the #5 ESS, the /ASPORIG service is added on the 1.8 View and modified on the 1.64 View to have the OHD option set to "Y" and the AIN Release 0.1 trigger number (3 in the SIL) from the 9.35 View.


SCREEN 1 OF 6           5ESS SWITCH ATTD0
                        RECENT CHANGE   1.8
                        ANALOG LINE/BRCS ASSIGNMENT

(*)1. TN         3422135            18. RAX      1          32. BUSY MONITOR  N
(*)2. OE         _;______________   19. LCC      1FR        33. ATT MLHG      ____
(*)5. PTY        _                  21. TTC      Y          34. RBV TGN       ____
(*)6. MLHG       _____                  HRI      0          35. CIDIAL        ALLOW
(*)7. MEMB       _____              24. SERHLN   _____      36. PIC           0222
   9. CHNG TN    3422135            25. BCK LNK  N          40. CID CW        N
  10. CHNG OE    L 00101003         26. SHARED   N
  13. CHNG PTY   I                  27. SAUTO    N
      CHNG MLHG  0                  28. SUSO     N
      CHNG MEMB  0                  29. SUST     N
  16. NEW TN     _______            30. ICP      N
  17. MFRI       N                  31. PRIVACY  N

Enter Review, Change-insert, Validate, screen#, or Print:








SCREEN 2 OF 6 5ESS SWITCH ATTD0 RECENT CHANGE 1.8 ANALOG LINE/BRCS ASSIGNMENT >47. BFGN ______ _ 50. FEATURE LIST (FL) ROW FEATURE A P C R ROW FEATURE A P C R ROW FEATURE A P C R ROW FEATURE A P C R 1 /ASPORIG Y _ N N 10 _______ _ _ _ _ 19 _______ _ _ _ _ 28 _______ _ _ _ _ 2 /CWC1 Y _ N N 11 _______ _ _ _ _ 20 _______ _ _ _ _ 29 _______ _ _ _ _ 3 /MW3WC Y _ N N 12 _______ _ _ _ _ 21 _______ _ _ _ _ 30 _______ _ _ _ _ 4 /CFV Y _ N N 13 _______ _ _ _ _ 22 _______ _ _ _ _ 31 _______ _ _ _ _ 5 /CFBLAC Y _ N N 14 _______ _ _ _ _ 23 _______ _ _ _ _ 32 _______ _ _ _ _ 6 /CFDAAC Y _ N N 15 _______ _ _ _ _ 24 _______ _ _ _ _ 33 _______ _ _ _ _ 7 _______ _ _ _ _ 16 _______ _ _ _ _ 25 _______ _ _ _ _ 34 _______ _ _ _ _ 8 _______ _ _ _ _ 17 _______ _ _ _ _ 26 _______ _ _ _ _ 35 _______ _ _ _ _ 9 _______ _ _ _ _ 18 _______ _ _ _ _ 27 _______ _ _ _ _ 36 _______ _ _ _ _ Enter Review, Change-insert, Validate, screen#, or Print: 5ESS SWITCH ATTD0 RECENT CHANGE 9.35 (5324) NETWORK SERVICES TRIGGER DEFINITION *1. TRIG NBR 3 #2. APPLICATION ASP 3. ALT GBL TITLE __________ 4. SERV KEY _____ 5. STP TT NBR _____ 6. ADM ST CD ULK 7. AIN REL R0D1 Enter Review, Change-insert, Validate, or Print: 5ESS SWITCH ATTD0 RECENT CHANGE 1.64 (56322,56323) ADVANCED SERVICES PLATFORM LINE PARAMETERS *1. FEATURE /ASPORIG; (*)3. OE _;___________ (*)7. MLHG _____ (*)2. TN 3422135; (*)6. PTY _ (*)8. MEMB _____ ORIGINATING TRIGGERS TERMINATING TRIGGERS TRIG TYPE TRIG NBR TRIG ACT DFLT ROUTE TRIG TYPE TRIG NBR TRIG ACT 9. OHI ___ N N 21. TA ___ N 12. OHD 3 Y TRIG TYPE ALLOWED TRIG ACT 15. FCD N N 25. INTRA OFFICE FWD ___ 18. CDP N N 26. INTRA OFFICE FWD ___