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ATT DEFINITY Communications System Generic 3 Instructions Manual
ATT DEFINITY Communications System Generic 3 Instructions Manual
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Dial Access to Attendant Issue 3 March 1996 3-647 Dial Access to Attendant Feature Availability This feature is available with all Generic 3 releases. Description Allows voice terminal users to access an attendant by dialing an attendant access code. Attendants can then extend the call to a trunk or to another voice terminal. In G3vsV1/G3sV1 and G3iV1, the access code is always the single digit 0. For G3i-Global, G3rV1, G3V2, and later releases, this code is a dministrable and may be any one or two d i git numb er; the default is 0. Considerations With Dial Access to Attendant, voice terminal users can access the attendant whenever attendant aid is needed by dialing the attendant access code. A voice terminal user calling the attendant b y dial access cannot be added to an existing conference by the attendant. Interactions Restriction — Origination (administered to a voice terminal by the COR) prohibits placing any calls, including Dial Access to Attendant calls. For G3v1/G3sV1 and G3iV1 only, the attendant group dial c o de must be zero and cannot b e administered to another value. (This dial code can be administered for G3i-global, G3rV1, G3V2, and later releases.) Administration The administrator may select an extension numb er other than zero for this feature. However, in the United States 0 has traditionally been use d for operator assistance in both the p ublic network and in PBXs, Also, consideration should be given to the fact that prior to the emergence of 911 systems, the dialing of 0 was customary in the United States for emergencies and other urgent assistance requests. Using an extension numb er other than 0 for dial access to the attendant could create confusion and delay resp onse to an emergency.
Feature Descriptions 3-648Issue 3 March 1996 Hardware and Software Requirements No a d ditional hardware or software is required.
Dial Plan Issue 3 March 1996 3-649 Dial Plan Feature Availability This feature is available with all Generic 3 releases. Description The Dial Plan is the system’s guide to digit translation. When a digit is dialed, the system must know what to expect, based on that d i git. For exam ple, if a voice terminal user dials a 4, the system must know how many more digits to exp ect before the call is processed. There are a number of enhancements and changes for G3i-Global, G3rV1, G3V2, and later releases. There are two digit tables giving more flexibility in the d ial plan. The numb er of extensions is greatly increased and, for G3rV1, G3V2, and later releases, there is the introduction of Extension Number Portability. The number of trunk access c odes increased significantly as well as other capacities. See the System Capacity Limits table in for more details. The Dial Plan, or first-digit (and in G3rV1, G3i-Global, G3V2, and later releases, the second-digit) table, established during administration for each system, provides information to the switch on what to d o with dialed digits. The tables define the intended use of a code beginning with a specific first digit (and or first two digits for G3i-Global, G3rV1, G3i-Global, G3V2, and later releases) and relates to the system how many digits to collect before processing the code. The choices of a first d igit are 0 through 9, *, and #. Permissible code uses and the allowable numb er of digits are listed below. nExtension Numbers Flexible numbering allows one, two, three, four, or five-digit extension numbers. The first digit in the extension number tells the system how many d i gits to exp ect the extension number to have. Extension numbers can have a first digit of 1 (0 for G3rV1, G3i-Global, G3V2, and later releases) through 9. For example, if a three-digit extension number is administered and the first digit is a 4, the extension numb ers can range from 400 to 499. Also, if a four-digit number with a 6 as the first d i git is a dministered, the extension numbers can range from 6000 to 6999. If multiple extension numb er lengths begin with the same digit, G3i-Global uses a timer to identify when all the d igits have been entered. nAttendant Dial access to the attendant group may b e achieved by dialing the single d i git ‘‘0.’’ It is also possible to set the dial plan so that some other digit is used to reach the attendant (for examp le, 9 in Italy). For G3rV1, G3i-Global, G3V2, and later releases, access can range from 0 to 9 with a
Feature Descriptions 3-650Issue 3 March 1996 length of one or more digits. In a d dition, Generic 3 provides for Individual Attendant Access by assigning each attendant an individual extension number. nTrunk Ac cess Codes A minimum of one digit and a maximum of three (G3iV1) d igits or four (G3i-Global and G3rV1, G3V2, and later releases) can be used. Trunk access codes can have a first digit of 1 (0 for G3rV1, G3i-Global, and G3V2) through 9. For example, 9 could be used for local trunks, 8 for WATS trunks, and 7 for tie trunks. For G3r and G3i-Global, * and # can be the first digit for TACs. TACs may be a maximum of 4 digit. TACs for DCS trunk groups and trunk groups controlled by DCS can be a maximum of 3 d i gits (or 4 if no DCS). nFeature A c cess Codes A minimum of one digit and a maximum of three digits can be used. The * and # buttons can be used as part of a feature a c cess c o de and, when used, must b e the first digit. The * or # counts as one d igit. For example, * 2 could be used to activate Call Forwarding All Calls and # 2 used to deactivate Call Forwarding All Calls. Feature access codes can also have a first digit of 1 through 9. For example, 3 2 could be used to activate Call Forwarding All Calls and 3 3 used to deactivate Call Forwarding All Calls. nPrefixed Extensions The dial plan does not route on the first digit prefix (0 through 9) but routes on the rest of the d igits. nMisc ellaneous Code Used to indicate that any dialed digit string starting with the first digit uses the second digit table for interpretation. For G3i-Global, G3V2, and later releases only, the length of this code can only be one. It can have a feature access code, trunk access code, attendant access code, and extensions on the second digit table. For G3rV1, G3V2, and later releases, UDP has its own forms in administration. This information is given in the UDP and ENP Tables. A UDP may also be established during administration as p art of the Dial Plan. This plan provides a common extension number plan that can be shared among a group of switches. If a UDP is to be established, all extension numbers (in the UDP numbering plan) must b e the same length (four or five d i gits b ut not both). So that calls route to the d esired switch, a UDP requires the following information: nA PBX Code, which represents the first 1 to 4 digits (five d i gits for G3rV1, G3V2, and later releases) of a 4- or 5-digit extension number and can range from 1 to 9999 with a maximum of 240 PBX Codes. nWhether or not the PBX Code is local to this system — this information is required for each PBX Code for G3vsV1/G3sV1, G3iV1, and G3i-Global.
Dial Plan Issue 3 March 1996 3-651 nAn RNX, which is associated with the PBX code and is used to select an AAR pattern for the call — this information is required for each PBX code. With G3i, the RNX is flexible (no fixed form). (With G3rV1, G3V2,a n d later releases, an ENP can also be used to route UDP calls.) nA PBX ID (1 to 63), which represents a specific switch — this information is required for G3V1 (exc ept G3rV1) for each PBX Code when the switch is located within a DCS. For G3rV1, G3V2, and later releases, the PBX ID is administered in the Node Number column of the ‘‘AAR Analysis” form.’ nA Local PBX ID, which represents the PBX ID of the local switch. Considerations The entire Dial Plan is d ependent on the first and second digit dialed. The 12 possible choices of a first d i git are 0 through 9, *, and #. Interactions nAll dial access features and services provided by the system require the Dial Plan. nWhen an ISDN/BRI station dials sufficient digits to route a call, b ut could route differently if a dditional digits were dialed, the station will not recognize the Conference or Transfer buttons. The user must delay dialing for three se conds or dial a # to indicate the call can be routed based on the digits already dialed. The Conference or Transfer b uttons are then recognized and the operation is completed by the switch. nFlexible numbering is supported in countries using R2-MFC trunk signaling without Group II tones. Different length extension numb ers can exist as long as the extensions have different first digits. Contact your AT&T representative for more information. Administration The Dial Plan is administered on a per-system basis by the System Manager. The following items require administration: nArea code where the system is located (in North America only) nWhether or not the serving central office requires the digit 1 to indicate a long-distance call (in North America only) nWhether or not a UDP is to be esta blished nThe type of code and the number of digits in the code for each first digit nO ptionally, a second digit table
Feature Descriptions 3-652Issue 3 March 1996 If a UDP is to be established on G3i (G3r contains ad d itional features as described in Uniform Dial Plan feature and is a dministered on a different form), the following items can be administered: nNumber of digits in plan (4 or 5) nPBX Codes nWhether or not each PBX Code is local to the PBX being administered nRNX (Per PBX Code) nPBX ID (Per PBX Code) Hardware and Software Requirements No a d ditional hardware or software is required.
Digital Multiplexed Interface Issue 3 March 1996 3-653 Digital Multiplexed Interface Feature Availability This feature is available with all Generic 3 releases. Description Supports two signaling techniques: Bit Oriented Signaling and Message Oriented Signaling for direct connection to host computers. Message Oriente d Signaling is used with ISDN-PRI. The DMI provides twenty-three 64 k b ps d ata c hannels, p lus one 64 k b ps channel for Common Channel Signaling. Within the data channel, DMI provides control information exchange and data formats supporting data transport at all standard data rates; each data channel can be used in one of the following transfer modes: nMode 0 — 64 kb ps Channel nMode 1 — 56 kb ps Channel nMode 2 — 0-19.2 kb ps Synchronous/Asynchronous nMode 3 — Multiple Virtual Channels ISDN-PRI can be assigned as the signaling mode. In this case, for G3i only, the TN767 DS1 or TN464C/D DS1 circuit pack and the TN765 Processor Interface circuit p ack must be used. For G3r, the TN464B/C/D circuit pack is required. The ISDN-PRI is a 1.544 Mb ps digital interface that consists of a 1.536 Mb ps signal multiplexed with an 8 kbps framing channel. The 1.536 M bps signal is divided into 24 channels of 64 kbps each (23 ‘‘B’’ voice or data channels and 1 ‘‘D’’ signaling channel). The D channel multiplexes signaling messages for the 23 B-c hannels. NOTE: The TN767 and the TN464C and later revisions of the DS1 circ uit packs provide a DSX1 interface. DMI trunks are accessed the same as tie trunks. The only difference is that DMI trunks are connected to host computers while tie trunks are c onnected to another switch. Each trunk functions like a PDM since the DMI protocol is identical to the DCP format used by the data modules.
Feature Descriptions 3-654Issue 3 March 1996 Considerations System DMI support offers high-volume (high-speed, high-capacity) data transmission, via DS1 digital facilities, between host computers and analog or digital data endpoints. DMI is widely supported. To date, more than 100 data processing suppliers, communications equipment suppliers, and device manufacturers have licensed DMI sp ecifications and have obtained the rights to implement DMI in their products. DMI trunks with ISDN-PRI signaling can be connected to a host computer, another PBX, or a p u blic or private network. Interactions The following features interact with the Digital Multiplexed Interface feature. nData Restriction DMI trunks cannot be data restricted. nModem Poolin g Data calls dialed from a local analog data endpoint to a DMI trunk must contain the Data Origination Access Code to obtain a conversion resource. Data calls on DMI trunks to local analog data endpoints will automatically obtain conversion resources, if available. Administration DMI sup port is assigned on a per-system basis by the System Manager. The following items require administration. nDS1 Circuit Pack — Assign the circuit pack to the system b efore administration of the associated trunks. nProcessor Interface Circ uit or Packet Control p ack (for G3i) — If ISDN-PRI Signaling is used, a TN765 Processor Interface circ uit pack or TN778 Packet Control must be assigned to work in tandem with the TN767 DS1 circuit pack or TN464C/D. NOTE: The TN767 and the TN464C and later revisions of the DS1 circ uit packs provide a DSX1 interface. nDMI Trunk Group — Associate the trunks to the groups.
Digital Multiplexed Interface Issue 3 March 1996 3-655 Hardware and Software Requirements One TN722B, TN767, or TN464 is required for every 23 DMI trunks. The TN464 is needed for G3r. If ISDN-PRI signaling is used, a TN765 Processor Interface or TN778 Packet Control is required for G3i. No a d ditional software is required.
Feature Descriptions 3-656Issue 3 March 1996 Direct Department Calling (DDC) and Uniform Call Distribution (UCD) Feature Availability This feature is available with all Generic 3 releases. Description Allows direct inward access to an answering group other than the attendant even if the system d oes not have the DID feature. This feature was called ‘‘Enhanced Uniform Call Distribution’’ in G2. A DDC or UCD answering group can consist of voice terminals and individual attendants (desc ribed in the Individual Attendant Access feature elsewhere in this document). In addition, a UCD group can consist of data modules, data line circuit ports, or modems. One extension number is assigned to all voice terminals, individual attendants, data modules, data line circuit ports, or modems in a group or department, that is, to a set that serves the same function and requires call distribution among the members of the group. Incoming calls to a DDC group or UCD group can be internal or external. The hunting algorithm used by the system to select an idle terminal or console is the only difference between DDC and UCD. With DDC, an incoming call rings the first available voice terminal or individual attendant in the administered sequence. If the first group member in the sequence is active on a call (busy), or has had his or her calls temporarily redirected (via Send All Calls, Call Forwarding All Calls, or the Hunt Group Busy Function discussed later), the call routes to the next group member, and so on. In other words, incoming calls always try to complete at the first group member in the administered sequence. Therefore, the calls are not evenly distributed among the DDC group members. With UCD, an incoming call rings the member of the group that has not received a UCD group call for the longest period of time (the most idle member). In other words, incoming calls to a UCD group extension number are distributed evenly among the group members. When DDC or UCD is not p rovid e d, incoming LDN calls, international exchange calls, 800 service calls, and automatic tie trunk calls are normally directed to an attendant who must extend the call. When DDC or UCD is provided on a trunk group, incoming calls are automatically directed to the d esired DDC group by the switch. Attendant intervention is not required.