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Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Instructions Manual
Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Instructions Manual
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DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 417 Data Restriction 15 nIntercom — Automatic and Dial An extension with Data Privacy or Data Restriction active cannot originate an intercom call. The user receives an intercept tone. nMusic-on-Hold Access If a user places a call with Data Privacy on hold, the user must withhold Music-on-Hold to prevent the transmission of tones that a connected data service might falsely interpret as a data transmission. nPriority Calls If a user activates Data Privacy, Priority Calls are denied on analog telephones. However, Priority Calls appear on the next available line appearance on multiappearance telephones. Data Restriction Data Restriction protects analog-data calls from being disturbed by any of the system’s overriding or ringing features or system-generated tones. Data Restriction applies to both voice and data calls. Once you administer Data Restriction for an analog or multiappearance telephone or trunk group, the feature is active on all calls to or from the terminal or trunk group. NOTE: Do not assign Data Restriction to attendant consoles. Administering Data Restriction 1. On the Station screen, set the Data Restriction field to y. Refer to ‘‘ Station’’ on page 894 for more information. 2. Choose one of the following trunk groups and set the Data Restriction field to y. Refer to ‘‘ ISDN trunk group’’ on page 750 and ‘‘Trunk Group’’ on page 980 for more information. nAccess nAdvanced Private-Line Termination (APLT) nCircuit Pack (CP) nCustomer-Premises Equipment (CPE) nDirect Inward Dialing (DID) nForeign Exchange (FX)
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 418 Data Restriction 15 nIntegrated Services Digital Network-Primary Rate Interface (ISDN-PRI) nRelease-Link Trunk (RLT) nTandem nTie nWide Area Telecommunications Service (WATS) Interactions - Data Restriction nAttendant Call Waiting and Call Waiting Termination If Data Restriction is active, Call Waiting is denied. nBusy Verification Busy Verification cannot be active when Data Restriction is active. nIntercom — Automatic and Dial An extension with Data Privacy or Data Restriction activated cannot originate an intercom call. The user receives an Intercept tone. nMusic-on-Hold Access If a user places a call with Data Restriction on hold, The user must withhold Music-on-Hold to prevent the transmission of tones that a connected data service might falsely interpret as a data transmission. nPriority Calls Priority Calls are allowed if the analog station is idle. Call Waiting (including Priority Call Waiting) is denied if the station is busy. However, Priority Calls appear on the next available line appearance on multiappearance telephones. nService Observing A data-restricted call cannot be service observed.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 419 Data-Only Off-Premises Extensions 15 Data-Only Off-Premises Extensions Data-Only Off-Premises Extensions allows users to make data calls involving data communications equipment (DCE) or digital terminal equipment (DTE) located remotely from the system site. A Data-Only Off-Premises Extension uses an on-premises modular trunk data module (MTDM). The system communicates with remote data equipment through the private-line facility linking the on-premises MTDM and the remote data equipment. Users can place data calls to this type of data endpoint using Telephone Dialing or Data Terminal (Keyboard) Dialing. Since there is no telephone at the remote site, originate data calls from the remote data terminal using Keyboard Dialing only. Administering Data-Only Off-Premises Extensions 1. On the Processor/Trunk Data Module screen, administer all fields. Refer to ‘‘ Data modules’’ on page 572 for more information. Considerations nThe system does not support communications between two TDMs. Modem Pooling is similar to a TDM, it cannot be used on calls to or from a Data-Only Off-Premises Extension. Interactions nTelephone Dialing An on-premises multiappearance telephone may have a Data Extension button associated with the TDM used for a Data-Only Off-Premises Extension. The telephone user and the remote user share control of the data module. Actions of the user at the telephone may affect the remote user. — 1-Button Transfer to Data The telephone user can transfer a call to the Data-Only Off-Premises Extension. The Data Extension button lamp on the telephone lights and the Call in Progress lamp on the data module lights during a data call. — Data Call Preindication The multiappearance telephone user presses the idle associated Data Extension button to reserve a data module. The data module is busy to all other users. When the user reserves a data module, the lamp associated with the Data Extension button winks and lights at any other associated telephones. A remote user receives the BUSY message when attempting to originate a call.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 420 Data Modules — general 15 — Return-to-Voice To establish a data call, the telephone user presses the associated busy Data Extension button to transfer the call to the telephone. The data module associated with the Data Extension button is disconnected from the call. The Call in Progress lamp on the data module goes dark. Data Modules — general A Data Module is a connection device between a basic-rate interface (BRI) or digital-communications protocol (DCP) interface of the switch and data-terminal equipment (DTE) or data-communications equipment (DCE). The following types of data modules can be used with the system: nAnnouncement data module nData line data module nProcessor/trunk data module (P/TDM) nNetcon data module (G3si configurations only) Refer to DEFINITY ECS Administration for Network Connectivity for more information. nProcessor interface data module (G3si configurations only). Refer to the DEFINITY ECS Administration for Network Connectivity for more information. nSystem port data module (G3r configurations only) nX.25 data module (G3r configurations only). Refer to DEFINITY ECS Administration for Network Connectivity for more information. n7500 data module nWorld Class BRI data module nEthernet data module. Refer to DEFINITY ECS Administration for Network Connectivity for more information. nPoint-to-Point Protocol (PPP) data module. Refer to DEFINITY ECS Administration for Network Connectivity for more information. NOTE: The 51X series Business Communications Terminals (BCTs) are not administered on the Data Module screen. The 510 BCT (equivalent to a 7405D with a display and built-in DTDM), 515 BCT (equivalent to a 7403D integrated with 7405D display module function, data terminal and built-in DTDM), and the 7505D, 7506D, and 7507D have a DCP interface but have built-in data module functionality. Both are administered through the Station screen.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 421 Data Modules — general 15 Detailed description of data modules TTI allows data modules without hardware translation to merge with an appropriate data module connected to an unadministered port. The unadministered port is given TTI default translation sufficient to allow a terminal connected to the data module (connected to the port) to request a TTI merge with the extension of a data module administered without hardware translation. NOTE: TTI is not useful for Announcement and X.25 hardware. Administration Without Hardware supports PDM, TDM, Data-Line, Announcement, and X.25 data modules. NOTE: The 513 BCT has an EIA interface rather than a DCP interface (no built in data module, attachable telephone, or telephone features). The 513 BCT is not administered; only the data module to which the 513 BCT is connected is administered. 7400A/7400B+/8400B+ Data Module Use the 7400A data module instead of an MTDM when you support combined Modem Pooling. The 7400A data module supports asynchronous operation at speeds up to 19200-bps, and provides a DCP interface to the switch and an EIA 232C interface to the associated modem. The 7400A operates in stand-alone mode as a data module. 7400B+ and 8400B+ data modules support asynchronous-data communications and operate in stand-alone mode for data-only service or in linked mode, which provides simultaneous voice and data service. The 7400B+ and 8400B+ provide voice and data communications to 7400D series phones and 602A1 CALLMASTER phones that have a connection to a data terminal or personal computer. The data modules integrate data and voice into the DCP protocol required to interface with the switch via a port on a digital-line circuit pack. Use the 7400B+ or 8400B+ instead of an MPDM when you need asynchronous operation at speeds up to 19.2-kbps to provide a DCP interface to the switch for data terminals and printers. The 7400B+ and 8400B+ do not support synchronous operation and keyboard dialing. Dialing is provided using the standard Hayes command set. 7400D This data module supports synchronous operation with AUDIX, CMS, and DCS. It provides synchronous data transmissions at speeds of 19.2-Kbps full duplex.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 422 Data Modules — general 15 7400C High Speed Link The 7400C high-speed link (HSL) is a data-service unit that allows access to DCP data services. It provides synchronous data transmission at speeds of 56- and 64-Kbps and provides a link to high-speed data networks. Used for Group 4 fax applications that include electronic mail and messaging, and electronic storage of printed documents and graphics. Use the 7400C for video teleconferencing and LAN interconnect applications. 7500 Data Modules The 7500 Data Module connects data-terminal equipment (DTE) or data-communications equipment (DCE) to the ISDN network. The 7500 Data Module supports EIA 232C and V.35 interfaces and RS-366 automatic-calling unit interface (for the EIA 232C interface only). The 7500 has no voice functions. Configure in the following ways: nAsynchronous DCE 300, 1200, 2400, 4800, 9600, 19200-bps nSynchronous DCE 1200, 2400, 4800, 9600, 19200, 56000, 64000-bps nAsynchronous DTE (used for modem pooling) up to 19200-bps The 7500 Data Module is stand-alone or in a multiple-mount housing. Asynchronous Data Module NOTE: The alias station command cannot be used to alias data modules. Use the Asynchronous Data Module (ADM) with asynchronous DTEs as a data stand for the 7500 and 8500 Series of ISDN-BRI phones, thus providing connection to the ISDN network. The ADM provides integrated voice and data on the same phone and supports data rates of 300, 1200, 2400, 4800, 9600, and 19200-bps. This module also supports the Hayes command set, providing compatibility with PC communications packages. Related topics Refer to ‘‘ Data modules’’ on page 572 for more information.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 423 Administered Connection 15 Administered Connection An Administered Connection (AC) is a connection between two access or data endpoints. DEFINITY ECS automatically establishes and maintains the connection based on the attributes you administer. ACs provides the following capabilities. nSupport of both permanent and scheduled connections nAuto Restoration (preserving the active session) for connections routed over Software Defined Data Network (SDDN) trunks nAdministrable retry interval (from 1 to 60 minutes) per AC nAdministrable alarm strategy per AC nEstablishment/retry/auto restoration order based on administered priority Detailed description Establish an AC between the following: nTwo endpoints on the same switch nTwo endpoints in the same private network, but on different switches nOne endpoint on the controlling switch and another endpoint off the private network In all configurations, administer the AC on the switch having the originating endpoint. For an AC in a private network, if the two endpoints are on two different switches, normally the connection routes via Automatic Alternate Routing (AAR) through tie trunks (ISDN, DS1, or analog tie trunks) and intermediate switches. If required, route the connection via Automatic Route Selection (ARS) and Generalized Route Selection (GRS) through the public network. The call routes over associated ISDN trunks. When the far-end answers, a connection occurs between the far-end and the near-end extension in the Originator field on the AC screen. Because the system makes an administered connection automatically, you do not use the following: nData Call Setup Do not assign a default dialing destination to a data module when it is used in an AC. nData Hotline Do not assign a hotline destination to a data module that is used in an AC. nTerminal Dialing Turn off terminal dialing for data modules involved in an AC. This prevents display of call-processing messages (INCOMING CALL,...) on the terminal.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 424 Administered Connection 15 Access endpoints Access endpoints are non-signaling trunk ports. They neither generate signaling to the far-end of the trunk nor respond to signaling from the far-end. Designate an access endpoint as the originating endpoint or destination endpoint in an AC. Typical AC applications The following are typical AC applications: nA local data endpoint connection to a local or remote-access endpoint. Examples: an MPDM ACCUNET digital service connecting to SDDN via an ISDN trunk-group DS1 port; an MPDM ACCUNET digital service connecting to an ACCUNET Switched 56 Service via a DS1 port. nA local-access endpoint connecting to a local or remote-access endpoint. Examples: a DSO cross-connect and a 4-wire leased-line modem to a 4-wire modem connection via an analog tie trunk. nA local data endpoint connecting to a local or remote data endpoint such as a connection between two 3270 data modules. NOTE: The following guidelines do not include AAR and ARS, or GRS administration information for routing AC calls over trunk groups. Refer to the respective feature elsewhere in this book for that information. Establishing Administered Connections The originating switch attempts to establish an AC only if one of the following conditions exist: nAC is active. nAC is due to be active (either a permanent AC or time-of-day requirements are satisfied if it is a scheduled AC). nOriginating endpoint is in in-service or idle state. If the originating endpoint is not in service or is idle, no activity takes place for the AC until the endpoint transitions to the desired state. The originating switch uses the destination address to route the call to the desired endpoint. When the switch establishes two or more ACs at the same time, the switch arranges the connections in order of priority.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 425 Administered Connection 15 AC attempts can fail for the following reasons: nResources are unavailable to route to the destination. nA required conversion resource is not available. nAccess is denied by class of restriction (COR), facilities restriction level (FRL), or bearer capability class (BCC). Or, an attempt is made to route voice-band-data over SDDN trunks in the public switch network. nDestination address is incorrect. nDestination endpoint is busy. nOther network or signaling failures occur. In the event of a failure, an error is entered into the error log, which generates an alarm, if it is warranted by your alarming strategy. You can display AC failures via the status-administered connection command. As long as an AC is due to be active, the originating switch continues to establish an AC unless the attempt fails because of an administrative error (for example, a wrong number) or service-blocking condition (for example, outgoing calls barred). nThe frequency with which failed attempts are retried is determined by the administered retry interval (1 to 60 minutes) for each AC. nRetries are made after the retry interval has elapsed regardless of the restorable attribute of the AC. nACs are retried in priority order. nWhen you change the time of day on the switch, an attempt is made to establish all ACs in the waiting-for-retry state. Dropping Administered Connections An AC remains active until one of the following occurs: nThe AC is changed, disabled, or removed. nThe time-of-day requirements of a scheduled AC are no longer satisfied. nOne of the endpoints drops the connection. This could be because of user action (in the case of a data endpoint), maintenance activity resulting from an endpoint failure, busying out of the endpoint, or handshake failure. If the endpoints are incompatible, the connection is successful until handshake failure occurs. NOTE: An AC between access endpoints remains connected even if the attached access equipment fails to handshake. nAn interruption (for example, facility failure) occurs between the endpoints.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Managing data calls 426 Administered Connection 15 If an AC drops because it was disabled/removed or is no longer due to be active, no action is taken. If an AC drops because of changed AC attributes, an immediate attempt is made to establish the connection with the changed attributes if it is still due to be active. Existing entries in the error/alarm log are resolved if they no longer apply. If handshake failure resulted in the dropping of the connection, in the case of an AC involving at least one data endpoint, no action is taken for that AC until the change administered-connection command is executed. Administered Connections failure: Auto Restoration and Fast Retry When an active AC drops prematurely, you must invoke either auto restoration or fast retry to determine whether auto restoration is attempted for an active AC. If you option AC for auto restoration and the connection was routed over SDDN trunks, auto restoration is attempted. During restoration, connections are maintained between the switch and both endpoints. In addition to allowing the active session to be maintained, AC also provides a high level of security by prohibiting other connections from intervening in active sessions. Auto restoration generally completes before the 60-second endpoint holdover interval. If auto restoration is successful, the call might be maintained (no guarantee). The restoration is transparent to the user with the exception of a temporary disruption of service while restoration is in progress. A successful restoration is reflected by the restored state on the status AC screen. Although the restoration was successful, the data session may not have been preserved. If auto restoration is not active or if the AC is not routed over SDDN trunks, the switch immediately attempts to reestablish the connection (fast retry). The switch also attempts a retry if the originating endpoint initiated the drop. With fast retry, connections are not maintained on both ends. Fast Retry is not attempted for an AC that was last established via fast retry, unless the AC is active for at least two minutes. If auto restoration or fast retry fails to restore or reestablish the connection, the call drops and the AC goes into retry mode. Retry attempts continue, at the administered retry interval, as long as the AC is due to be active.