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ATT DEFINITY Communications System Generic 3 Instructions Manual
ATT DEFINITY Communications System Generic 3 Instructions Manual
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Automatic Circuit Assurance (ACA) Issue 3 March 1996 3-197 When ACA is enabled by the System Manager, the ACA measurements are made and the audit trail is u pdated each time a preset counter threshold is reached. However, in order for a referral call to be sent, ACA referral must be activated. ACA referral is activated whenever an attendant or user presses an ACA b utton. When this is done, the system can send referral calls to the destination specified by the System Manager. The referral call destination can be the attendant console group, a specific attendant console, a display-equipped voice terminal, or, if Voice Message Retrieval is p rovid e d, a non-display voice terminal. The information a ppearing on the display identifies the call as an ACA call, identifies the trunk group access code and the trunk group member number, and shows the reason for referral (short or long holding time). When the call is answered, this information is displayed and remains displayed until the call is released. Each time a counter threshold is reached, a record of the information is stored in the audit trail. The audit trail records are available to the System Manager. Each record contains the following information: nTime and Date of occurrence nTrunk group number, trunk access code, and trunk group member nType of referral (short or long holding time) If the referral call destination d oes not answer the call within three minutes, the call times out and this information is entered in the audit trail. The audit trail is examined once each hour. If any entries indicate a referral call was not completed, the call is tried again. ACA can be enabled or disabled for the entire system by the System Manager. The System Manager can also enable or disable ACA for each individual trunk group. When ACA is disabled, ACA measurements are not made. Two extensions must be assigned for the purpose of letting the referral call destination i dentify the type of ACA call (short or long holding time). The two extensions are assigned as a short holding time origination extension and a long holding time origination extension. These extension numbers do not require hardware circ uit packs. As an illustration of how ACA functions, assume the following: nThe ACA is enabled for the entire system. nThe ACA referral destination is extension 389. nThe ACA long holding time origination extension is 423. nThe long holding time limit for trunk group 3 (trunk access code is 9) is one hour. nThe ACA referral is activated.
Feature Descriptions 3-198Issue 3 March 1996 With the above information, assume a call is ma de on a trunk in trunk group 3 and the call lasts more than one hour. Then, the threshold for the long holding time counter is reached, a referral call is made to extension 389, the display reflects a long holding time call, and the information is entered in the audit trail. The referral destination can then have the operation of the trunk checked and taken out of service if defective. Considerations The Auto matic Circuit Assurance (ACA) feature provides better service through early detection of faulty trunks and consequently reduces out-of-service time. Some types of trunk failures cause p eople to shorten their c alls. For example, an excessive number of short calls may indicate a noisy trunk. Similarly, a trunk that remains busy for an abnormally long time may be p ermanently b usy due to a trunk fault. This feature takes advantage of these characteristics to identify possibly defective trunks. Once the trunk has been identified as possibly being defective, the Busy Verification of Terminals and Trunks feature can be used to check the trunk. The audit trail contains a maximum of 64 records at any one time. The oldest information is overwritten by the newest information. Measurements are not made on personal central office lines, out-of-service trunks, or trunks undergoing maintenance testing. If ACA referral calls are sent off the PBX g enerating the referral, the disp lay information indicating the failed trunk will b e lost even if the referral call is made over a DCS network. Interactions The following features interact with the Automatic Circuit Assuranc e (ACA) feature. nCAS When CAS is activate d, the referral call d estination must be on the local switch. A referral destination of 0 is interpreted as the local attendant, if one exists. The CAS attendant cannot activate or deactivate ACA referral calls at a branch location. nInternal Automatic Answer (IAA) Calls generated by the Automatic Circuit Assurance (ACA) feature are not eligible for IAA. nNight Service — Night Station Service
Automatic Circuit Assurance (ACA) Issue 3 March 1996 3-199 Referral calls will not be placed if the system is in the Night Service mo de. nVisually Impaired Attendant Service Automatic Circuit Assurance applies for both Station and Attendant users. However: — If the attendant presses the D I SPL A Y STATUS button and an incoming ACA call has not been answered, then Automatic Circuit Assurance is voiced to the visually-impaired attendant. — If the attendant presses the D ISPLAY STA TU S button and the incoming ACA call has been answered, then Automatic Circuit Assurance an d the extension number assigned to the phantom ACA call are simultaneously voiced to the visually-imp aired attendant. — If the switch is equipped with a voice synthesis board, ACA referral calls are accompanied by an audible message identifying the type of ACA infraction encountered. The message is “Automatic circ uit assurance < lon g > or holding time threshold has been exceeded for trunk group < # > member numb er . The member numb er here is actually the Trunk A ccess Code (TAC). Administration ACA is administered by the System Manager. The following items require administration: nWhether ACA is enabled or disabled (per system) nShort holding time origination extension (per system). Assigned name must reflect short holding time nomenclature. nLong holding time origination extension (per system). Assigned name must reflect long holding time nomenclature. nReferral destination (per system) nWhether ACA is assigned (per trunk group) nShort holding time limit (per trunk group) nLong holding time limit (per trunk group) nThreshold for short holding time counter (per trunk group) nACA activate/deactivate button on attendant console or voice terminal (one per system) Administer these items on the ‘‘Feature Related Parameter’’, ‘‘Attendant Console’’, ‘‘Trunk Group’’, and ‘‘Station’’ forms.
Feature Descriptions 3-200Issue 3 March 1996 Hardware and Software Requirements A TN725 Speech Synthesizer circ uit pack is required if the referral destination is not a disp lay-equipped voice terminal. A TN457 Speech Synthesizer circuit pack is required to hear ACA messages is English, and a TN433 Speech Synthesizer circuit pack is required to hear ACA messages in Italian. No a d ditional software is required.
Automatic Incoming Call Disp lay Issue 3 March 1996 3-201 Automatic Incoming Call Display Feature Availability Display of Incoming Calls is available with all Generic 3 releases. Description Provides display-equipped voice terminal users who are already active on a call with the i dentity of a second or subsequent caller. The identity is automatically displayed on the terminal’s alphanumeric terminal for 30 seconds. The d isplays (which are administrable) can be in English, French, Italian, or Spanish. This feature a p plies when an incoming call terminates at a user’s voice terminal while the user is active on another call appearance. The information displayed on the current call is replaced by the identity of the incoming call. The identity of the incoming call normally remains displayed for 30 seconds unless there is another incoming call, the user hangs up, or the calling party hangs up. After 30 seconds, the display returns to the current call information. With the CALLMASTER terminal, the display goes blank after 30 seconds. A third or subsequent incoming call overwrites the information displayed on the previous call and restarts the 30-second interval. In any case, the most recent call to terminate at the user’s voice terminal is the call identified by the display. If the p arty whose identity is currently being displayed hangs up, the display returns to the current call information. If the user hangs up on the current call before the 30-second interval expires on the incoming call, the disp lay is cleared. The information displayed on the current call is not replaced by the identity of the incoming call if the called user is in the p rocess of dialing the current call or if the Outgoing Display Option is not a dministered to the trunk group being used. Considerations The Automatic Incoming Call Display feature lets certain users, while active on one call, know the identity of another incoming caller. This is done without the use of an Inspect button. By knowing who is calling, the user can handle the calls accordingly. The incoming call must terminate at the user’s voice terminal in order to be displayed. Calls forwarded to another extension are not displayed.
Feature Descriptions 3-202Issue 3 March 1996 The display must be in the normal mode to display the identity of the incoming call. The Automatic Incoming Call Disp lay does not apply under the following conditions: nThe called station user is not off-hook on a call. nThe called user’s display is turned OFF. nThe called user’s display is in any other mode other than normal mode. nThe called station is being dialed. Interactions This feature enhances the Voice Terminal Display feature by providing automatic identification of incoming calls. The same incoming call information can be provided by putting the display in the inspect mode; however, this is not automatic and must be done manually for each call. When a station is optioned for PC/PBX, then, d e pending on the set type, the call appearance designation (a=, b =, c =, d =) may be omitted from the displayed information in order for the find feature of the Call Log in the PC/PBX Connection software to work properly. Administration Unless you want to administer a language other than English for the displays, no administration is required. See the Administrable Language Displays feature for a description of multi-language displays. Hardware and Software Requirements Requires a 515 BCT, a display-equip ped voice terminal, or a voice terminal capable of displaying information through an attached data terminal. No a d ditional software is required.
Automatic Route Selection (ARS) Issue 3 March 1996 3-203 Automatic Route Selection (ARS) Feature Availability This feature is optional with all Generic 3 releases. Description Routes calls over the public network based on the preferred (normally the least expensive) route available at the time the call is placed. ARS provides a choice of routes for any given public network call. The following types of trunk groups can be accessed by ARS: nLocal central office — Used for local calls and to provide access to a long-distance carrier. Access to the long-distance carrier can be provided either automatically by the central office or by a carrier access code (where supported). nForeign exchange — Used to emulate local c alling in an area not served by the local central office. Like the local central office, the foreign exchange office provides a choice of long-distance carriers. nWATS — Used to provide calling to predefined geographic areas at a rate b ased on expected usage. nTie trunks — Used to p rovide access to an ETN, or to an EPSCS or CCSA office. (In some cases, it is preferable to allow a private network to handle the routing of calls destined for the public network.) nISDN-PRI — Used for calls over an ISDN and provides users access to a variety of switched nodal services such as MEGACOM telecommunications service, INWATS, and ACCUNET digital service and allows access to other inter-exchange carriers or private networks. A variety of numbers can be called using ARS, including 7-digit numbers, 10-digit numbers, International Direct Distance Dialing (IDDD) numbers, service codes, Customer-Dialed O perator-Serviced (CDOS) numbers (for example, in the United States, 0+ or 01+), and Inter-Exchange Carrier (IXC) numbers. ARS is particularly useful when one or more long-distance carriers and WATS are provided. The system selects the most preferred (normally least expensive) route for the call. Long-distance carrier code dialing is not required on routes selected by the system. Long-distance carrier c o des are assigned in translations to best benefit the customer on any given call. These codes are inserted as needed to guarantee automatic carrier selection. The system may serve as an ETN tandem switch. In this case, the system can access or be accessed by Intertandem Tie Trunks to/from other tandem switches and/or Access Tie Trunks to/from ETN main switches. The system can also
Feature Descriptions 3-204Issue 3 March 1996 access Bypass Tie Trunks to an ETN main switch. This d istinction as a tandem switch is important with respect to the routing of certain calls. ARS Dialing ARS begins when a user dials the ARS access code (normally the digit 9), followed by the number to be called. As soon as the user dials the ARS access code, the system checks to see if the user’s voice terminal extension has been Origination Restricted or Outward Restricted b y its assigned COR. The system also checks to see if the user has a Controlled Restriction of either Outward or Total. If any of these restrictions a pp ly, intercept treatment is a p plied to the call. Otherwise, the ARS call continues and the user can enter the number to be called. A second dial tone may or may not b e heard after the ARS access code is dialed, depending on the system administration. Inter-Digit Timeout The system uses a short inter-digit timer and a long inter-digit timer during the dialing process. Normally, a 10-second inter-d igit timer is used between each d i git for the user to continue dialing. If the digits dialed so far point to a valid destination, but there is a similar string of digits which is of different length, the short three-second inter-digit timer will b e started. If dialing does not continue before the timer expires, it is assumed that no more digits will follow, and # is a p pended by the system to indicate end of dialing. To override the timer for faster call processing, the originator may dial # to indicate end of dialing. A 10-se cond long inter-digit timer is used to wait for another digit when the digits dialed so far are not a valid destination. Timeout of this timer results in Intercept tone to the caller. When no length ambiguity exists and all d igits are collected, the call is routed, and no timer or # is required. Special Dialing Patterns The system recognizes certain dialing patterns on outgoing calls and routes these calls accordingly. The descriptions of these dialing patterns reflect the system defaults as used in the United States. Other countries may require different a dministration of these values. The following dialing patterns are recognized: nDDD Calls With Prefix Digit 1 Required The user may or may not be required to dial a 1 before dialing a seven- or 10-digit number, depending on the system’s dial p lan ad ministration. There are two cases where the digit 1 must be dialed:
Automatic Route Selection (ARS) Issue 3 March 1996 3-205 — Some metropolitan areas are so densely populated that there simply are not enough traditional central office codes. Therefore, it is possible that some NPA c o des, also called area c o des may also serve as CO codes. In this case, the digit 1 must be dialed if a 10-digit call is intended. The first digit tells the system whether to route the call as a seven-digit call within the home NPA (1 not dialed) or as a 10-digit call to another NPA (1 dialed). In this case, the dial p lan should be administered so that the user is required to dial 1 for 10-d i git calls. (This is unnecessary in G3r.) — Digit 1 dialing may also be required in areas near an NPA boundary. In these areas, certain calls to the adjacent NPA may b e local calls rather than toll calls. However, central office codes may be duplicated in the home and adjacent NPAs. Also a CO code in the home NPA may b e a toll call. Therefore, if the d igit 1 is not required on certain adjacent NPA local calls, then it must be dialed on the home NPA seven-digit toll calls so the system can differentiate between the intended destinations. nDDD Calls with Prefix Digit 1 Not Required The first di git following the ARS access code may or may not be a 1. In systems where the 1 prefix is dialed, but not required (as administered on the ‘Dial Plan’ form), d ialing the 1 prefix before a 10-digit call is optional and the prefix will be ignored. nIDDD Calls IDDD numb ers consist of a Country Code and a National Number. The National Numb er is simply the numb er used when calling within the country. The Country Code can be from one to three digits in length. In the NANP the National Number is 10 digits in length. The Country Code and National Number to gether cannot exceed 12 digits. In the NANP, international numb ers are recognized by special prefix codes: —011 — Indicates that the caller is making a station paid direct international call. The Country Code and National Number follow the 011 prefix. —01 — Indicates the caller desires operator assistance on an international call, such as person-to-person, credit card, collect call, and so on. The Country Code and National Number follow the 01 prefix. nOperator Assistance Calls The first digit following the ARS access code is a 0. If a 0 is dialed by itself to a c cess an operator, a special inter-digit time-out occurs, the route for dial 0 calls is selected and a 0# is outpulsed. If the user dials another 0, the route for 00 is selected and a 00# is outpulsed. The call is routed to the toll o perator (if one exists) instead of the local operator in this case.
Feature Descriptions 3-206Issue 3 March 1996 nOperator Assisted and International Calls The first di gits following the ARS access code are 0 (operator) or 00 (toll operator) optionally followed by a 10-digit DDD number, or 01 or 010 (international o perator) for international dialing followed by international destination a ddress digits. Because of the variable numb er of digits required on these calls, an inter-digit time-out is used to recognize end of dialing. nSpecial Service Codes The first three digits following the ARS access code are of the form X11 (where X = 0 through 9) with or without dialing the 1 prefix digit. This is called a service code. These are recognized as complete addresses if no further d i gits are dialed, and are routed to the appropriate facility. If it is administered with a length of three to seven digits, the inter-digit time-out determines whether the call is a 3- or 7-d i git call. For example, if the user dials 911, the call will route to the police/emergency operator; if the user dials 811-XXXX, the call will b e translated as a seven-digit call for the repair bureau corresponding to the last four d i gits ( 811 is a service code for repair). In any case, the call is route d based on the first three digits ( X11) for these special services. If the first three digits after the prefix digit (if any) are not in the form X11, further processing is required to route the call. nCalls Dialed with Inter-Exchange Carrier (IXC) Access The first di gits following the ARS access code are an IXC Ac c ess Code. The access code may be followed by a DDD or an IDDD number. This gives the user control over which carrier or facilities should be used for routing the call. The call is routed based on the administration of the IXC prefixes in the ARS Digit Analysis Table (and Page 2 of the “ IXC” form) discussed later in this chapter. For G3r, the system may ignore the IXC code when routing if it cannot find a route using the IXC c o de. The system supports access to three general IXC arrangements which are commonly referred to as Feature Groups A, B, and D: nFeature Group A access dialing is of the form NXX-XXXX (where N is any digit 2 through 9, and X is any d i git from 0 through 9) and may be followed by a Personal Identification Number (PIN) (for examp le, 800-XXXX). nFeature Group B access dialing is of the form 950-0XXX or 950-1XXX (where X is any digit from 0 through 9) and may be followed by a PIN. nFeature Group D access dialing is of the form 10XXX (where X is any digit from 0 through 9). As of 1993, equal access codes of the form 101XX XX will be permitted. From a caller’s perspective, the major differences between use of the various groups are: nAccess to Feature Groups A and B requires the dialing of seven digits, whereas access to Feature Group D requires just five digits.