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Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide
Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide
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DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1557 Transfer — Outgoing Trunk to Outgoing Trunk 20 Related topics n‘‘Feature-Related System Parameters’’ on page 632 — Music on Transferred Trunk Calls field — Intercept Treatment on Failed Trunk Transfers field — Abort Transfer — Transfer Upon Hang-Up n‘‘Class of Restriction’’ on page 520 — Block Transfer Display field Transfer — Outgoing Trunk to Outgoing Trunk Outgoing Trunk to Outgoing Trunk Transfer (OTTOTT) permits a controlling party (such as a station user or attendant) to initiate two or more outgoing trunk calls and then connect the trunks. This operation removes the controlling party from the connection and conferences the outgoing trunks. Alternatively, the controlling party can establish a conference call with the outgoing trunks and then drop out of the conference, leaving only the outgoing trunks on the conference. NOTE: This is an optional enhancement to Trunk-to-Trunk Transfer and requires careful administration and use. Distributed Communication System (DCS) Trunk Turnaround may be an acceptable and safer alternative to this feature. OTTOTT allows calls to be established in which the only parties involved are external to the switch and are on outgoing trunks. This type of call can result in locked-up trunks, such as trunks that cannot be disconnected except by busying-out and releasing the affected trunk circuit. To clear the lockup, a service technician must reseat the trunk board, or busy-out and release the affected trunk. Detailed description This feature is enabled by administering the Disconnect Supervision Out field to y on at least one outgoing trunk group screen, and enabling Trunk-to-trunk transfer on the Feature Related System Parameters screen. In addition, the network must provide answer supervision. The answer supervision test increases the probability, but does not guarantee, that a disconnect signal is received from the remote end of the trunk. To mitigate problems associated with its accidental use, this feature is administrable only on trunk groups on the Trunk Group screen. It is not a system option.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1558 Transfer — Outgoing Trunk to Outgoing Trunk 20 DCS networks provide a similar but more restrictive version of this feature, called DCS Trunk Turnaround, which permits two outgoing trunks to be connected when the switch at the remote end of one of the trunks agrees to turn around the logical direction of the trunk. DCS trunk turnaround is permitted, when some other party involved in the call (at the remote switch) can provide disconnect supervision. Without OTTOTT or DCS, a conference involving two or more outgoing trunks is permitted only when at least one remaining conference party is an attendant, incoming trunk, or station. Considerations nOTTOTT is not intended for use in DCS networks, since DCS Trunk Turnaround provides comparable capabilities much more safely. However, use of OTTOTT with DCS is not prohibited, and may be useful when one or more of the trunks goes off the DCS network. Security Measures !SECURITY ALERT: This feature can be used to transfer an outside party to a trunk over which toll calls might be made, and enabling it poses significant security risks. Since trunks have to be specifically administered for OTTOTT, you should examine the Class of Restriction (COR) and Facility Restriction Level (FRL) of that trunk group to determine if they are appropriate. !SECURITY ALERT: OTTOTT is not a system-wide parameter. It is administered on a trunk-group basis. You must enable the Trunk-to-Trunk Transfer field on the Feature-Related System Parameters screen for this feature to work. If you deem that the feature is not relevant to your business practices, do not enable it. Alternately, if a temporary need presents itself, you can temporarily enable this feature and then turn it off.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1559 Transfer — Outgoing Trunk to Outgoing Trunk 20 Interactions nDCS Trunk Turnaround OTTOTT increases the set of cases in which DCS Trunk Turnaround may be accepted. However, use of OTTOTT in combination with a DCS network is strongly discouraged. The following algorithm describes the DCS Trunk Turnaround request process. a. If any party on the call receives a local-dial, busy, intercept, or reorder tone, deny turnaround. b. If any remaining party is an answered station or attendant, accept turnaround. c. If any remaining party is on an incoming trunk, accept turnaround. For the purposes of this check, an outgoing DCS trunk that has been turned around an odd number of times via a DCS trunk turnaround is considered an incoming trunk with disconnect supervision. Similarly, an incoming DCS trunk that has been turned around an odd number of times is considered an outgoing trunk. d. If any remaining party is an outgoing trunk administered for OTTOTT that has received answer supervision, accept turnaround. e. If any remaining party is an outgoing DCS trunk, forward the turnaround request. f. Otherwise, deny turnaround. nIncoming Disconnect Supervision Outside of the U.S., incoming disconnect supervision is a switch capability that restricts transfers or conferences for certain incoming trunks. In the U.S., all incoming trunks are assumed to provide disconnect supervision. In some countries this assumption is not valid, so administer whether or not an incoming trunk provides disconnect supervision for each trunk group. nPersonal Central Office Lines Transfer of personal CO lines (PCOLs) is not subject to the normal restrictions applied to transfer of other trunks. These transfers are allowed since the PCOL appearance remains on one or more stations as a feature button. System users must be aware that the DROP button cannot be used to disconnect the transferred-to party from the call. Hence, if an outgoing PCOL is transferred to an outgoing trunk and neither of the trunks can supply a disconnect signal, the two trunks lock up. nQSIG Global Networking If either call is over an ISDN-PRI trunk administered with Supplementary Service Protocol b (QSIG), additional call information may display.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1560 Transfer — Trunk-to-Trunk 20 nRelease Link Trunks RLTs are used by Centralized Attendant Service (CAS). An outgoing RLT at a remote branch is used to access an attendant at the main. The attendant at the main can transfer the incoming caller to a station or trunk at the branch. The RLT is typically used only for a short period of time and is usually idled after the transfer is established. A station at a branch can transfer an outgoing trunk to the attendant at the main. This transfer could be viewed as an OTTOTT (the attendant is accessed via an outgoing RLT). Since administering outgoing disconnect supervision for RLT trunks provides no additional capability, this administration is not provided for RLT trunks. nRestriction Restrictions on the transferring party may block a transfer or drop operation even when Outgoing Disconnect Supervision is provided. nTrunk-to-Trunk Transfer If this feature-related system parameter is set to restricted, all trunk-to-trunk transfer/release/drop operations for public trunks (CO, CPE, CAS, DID, DIOD, FX, and WATS) have calls terminated or receive denial. If the parameter is set to none, all trunk-to-trunk transfers (except CAS and DCS) have calls terminated or receive denial. Hence, this option must be set to all to enable OTTOTT operation for these types of trunks. The number of public-network trunks allowed on a conference call is administrable. This number defaults to 1, so if OTTOTT is being used to connect two or more public network trunks, you must increase this limit on the Feature-Related System Parameters form. nTrunks (CO, FX, and WATS) You cannot have two CO, FX, or WATS trunks in a OTTOTT connection, even if the Disconnect Supervision - Out field is set to y. Tra n sfer — Trunk-to-Trunk Trunk-to-Trunk Transfer allows the attendant or user to connect an incoming trunk call to an outgoing trunk. !SECURITY ALERT: Trunk-to-trunk transfer poses a significant security risk. Use this feature only with extreme caution. The system provides three levels of administration for this feature: system-wide, COR-to-COR, and COS.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1561 Transfer — Trunk-to-Trunk 20 To administer Trunk-to-Trunk Transfer system-wide, complete the Feature-Related System Parameters screen. To restrict Trunk-to-Trunk Transfer on a trunk-group basis, assign COR-to-COR calling-party restrictions on the Class of Restriction (COR) screen. To allow individual users to control Trunk-to-Trunk Transfers, assign capabilities on the Class of Service (COS) screen. Considerations nTrunk-to-Trunk Transfer is particularly useful when a caller outside the system calls a user or attendant and requests a transfer to another outside number. For example, a worker, away on business, can call in and have the call transferred elsewhere. nTransferred trunk calls can be administered to receive either music or silence. nSome central office (CO) trunks do not signal the PBX when the CO user disconnects from a call. The system ensures that incoming CO trunks without Disconnect Supervision are not transferred to outgoing trunks or to other incoming CO trunks without Disconnect Supervision. nAn attendant-assisted call connecting an outgoing trunk or incoming trunk without Disconnect Supervision to an outgoing trunk must be held on the console. The system does not allow the attendant to release the call. The attendant can, however, use the Forced Release button and disconnect all parties associated with the call. nIf a user has connected two outgoing trunks or an outgoing call and an incoming call without Disconnect Supervision, the user must remain on the call. Otherwise, the call is dropped. An incoming trunk with Disconnect Supervision can be connected to an outgoing trunk without the user remaining on the call. An incoming trunk can also be connected to another incoming trunk without the user remaining on the call if one of the incoming trunks has Disconnect Supervision. Interactions nAttendant Lockout Attendant Lockout does not function on Trunk-to-Trunk Transfer. nCall Vectoring Station control of Trunk-to-Trunk Transfer does not affect routing of incoming trunks to a VDN that ultimately routes to a destination off-net. A route to a number off the switch does not require you to enable trunk-to-trunk transfer.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1562 Trunk Flash 20 nTenant Partitioning Station control of Trunk-to-Trunk Transfer is prohibited between trunks in different tenant partitions if those partitions are restricted. Trunk Flash Trunk Flash allows a feature or function button on a multifunction telephone or attendant console to be assigned as a Flash button. Pressing this button while connected to a trunk (which must have been administered to allow trunk flash) causes the System to send a flash signal out over the connected trunk. Trunk Flash enables multifunction telephones to access central office customized services that are provided by the far-end or Central Office (CO) located directly behind the DEFINITY System. These central office customized services are electronic features, such as conference and transfer, that are accessed by a sequence of flash signal and dial signals from the DEFINITY system telephone on an active trunk call. The Trunk Flash feature can help to reduce the number of trunk lines connected to the DEFINITY switch by: nPerforming trunk-to-trunk call transfers at the far-end or CO, which eliminates the use of a second trunk line for the duration of the call and frees the original trunk line for the duration of the call. nPerforming a conference call with a second outside call party, which eliminates the need for a second trunk line for the duration of the call. NOTE: Some analog Dual-Tone Multi-Frequency (DTMF) telephone sets used in Italy and the United Kingdom are equipped with a FLASH button that, when pressed, generates a rotary digit 1. When an analog telephone which is administered as a DTMF telephone (for example, as a 2500 or 71nn-type telephone) transmits a rotary digit 1, the system treats the signal as a recall signal from the telephone set to the DEFINITY ECS. When used by a Centralized Attendant Service (CAS) attendant connected to an Release Link Trunk (RLT), the flash controls certain CAS features at the branch. When used by a multifunction telephone or non-CAS attendant connected to a CO, Foreign Exchange (FX), or Wide Area Telecommutings Service (WATS) trunk, the flash controls certain features (such as add-on) at the connected CO. Trunk Flash is not available on Personal Central Office Line (PCOL) groups. The system supports the Trunk Flash signal for incoming, outgoing, or 2-way call directions on selected 2-wire analog (ground-start or loop-start) or digital (DS1) trunks or Tie trunks on DS1.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1563 Trunk Flash 20 If the trunk group is a DS1 trunk in Italy, the Trunk Flash feature applies only to outgoing calls. If the trunk is not directly connected to the far end or CO providing the customized services, use of the Trunk Flash signal may cause the call to be disconnected by the far end or CO. Calls made after the Flash are not recorded in Call Detail Recording (CDR) records. Considerations NOTE: The Trunk Flash feature allows the telephone user to receive central office dial tone, and place a call that is not monitored by the DEFINITY system, and is not subject to restrictions (toll, FRL, COR, etc.). Therefore you should enable this feature with caution. nA Trunk Flash button can be assigned on CAS attendant consoles, non-CAS attendant consoles, and multifunction telephones. For CAS attendants, use of this button is limited to certain CAS features via RLT trunks. For multifunction and non-CAS attendant consoles, this button is used for the Trunk Flash feature. nFAC activation of the trunk flash feature is allowed. nThe Flash button is used by the Trunk Flash and CAS features. nSystem features (such as internal conference call, transfer, and call park) may be combined with custom services (that is, CO-based features that are activated/controlled by sending a flash signal over the trunk to the CO). However, mixing DEFINITY ECS features with custom services causes complications for the user when tracking a call. DEFINITY Systems cannot give the local telephone user status information on the custom services. nThe Trunk Flash feature may only be accessed if the call has only one trunk, the trunk must be outgoing from the PBX’s perspective, and the trunk group of that trunk has Trunk Flash enabled. The Trunk Flash feature is disabled when the call involves more than one trunk, even if all the trunks have Trunk Flash enabled. nAny DEFINITY ECS telephone can flash and dial a FAC to access the Trunk Flash feature; any DEFINITY ECS telephone with a flash button can access the Trunk Flash feature by hitting the flash button. The system allows as many as five telephones to participate in a conference call with the trunk line party. However, to access the Trunk Flash feature, at least one of the telephones must have a Flash button.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1564 Trunks and Trunk Groups 20 nIn a call involving more than one telephone, one of the telephones may press the Flash button, and another telephone may dial the phone number. The telephone that dials the phone number is not required to have a Flash button. nIf the far-end/CO does not support custom services, the call may be dropped by the far-end/CO on sending the flash signal or the signal may be ignored and a click-click sound is heard. Trunks and Trunk Groups Trunks connect DEFINITY ECS to other pieces of equipment (adjuncts) and to other switches. In general, trunks connect your switch to one of four things: nthe public telephone network na private telephone network nthe Internet or a private intranet nswitch adjuncts, such as a loudspeaker paging system or a source for music or announcements When trunks of the same type are used for the same application, assign them to the same trunk group. A trunk group allows you to assign service characteristics to the group rather than administering each trunk individually. NOTE: Trunks and access endpoints consume the same resource. The sum of trunks and access endpoints cannot exceed the total number of trunks allowed on your system. This chapter contains information about the most common analog and digital trunks. Specialized trunks such as Advanced Private-Line Termination (APLT), tandem, release-link, and DMI-BOS trunks are not covered in this manual. Refer to DEFINITY ECS Administration for Network Connectivity for information on these trunks. Brief description DEFINITY ECS supports the following basic trunk types. Access Used in Electronic Tandem Networks (ETN), access trunks connect satellite switches to the main switch. Unlike tandem trunks, access trunks do not carry traveling class marks (TCM) and thus allow satellite callers unrestricted access to out-dial trunks on the main switch.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1565 Trunks and Trunk Groups 20 CAMA — Centralized Automatic Message Accounting (E911) CAMA trunks route emergency calls to the local community’s Enhanced 911 systems and provide Caller’s Emergency Service Identification (CESID) information to the system. Public Service Answering Points (PSAP) use CAMA trunks to determine the caller’s physical address. NOTE: Lucent does not recommend tandeming 911 calls. When the CAMA feature is administered and a 911 call is placed from a DEFINITY ECS station, DEFINITY software searches for the proper CAMA Touch-Tone Receiver (TTR) resource in the port network (PN) where the CAMA trunk group is located. If the proper CAMA TTR resource is not available in that port network, the software checks any other available port networks for the CAMA TTR. If none is found in the entire system, a busy tone is returned to the calling party. However, if another trunk group is in the same routing pattern as the CAMA trunk group, the call routes to the next available trunk group in the pattern. For example, if a Central Office (CO) trunk group is used, then any available TTR resource can be used and the call routes as a normal call over the CO trunk and the public switched telephone network. E911 systems use CESID information to identify the location of the calling phone. The following features can cause incorrect CESID information to be sent with a 911 call. Bridged stations 911 calls from a bridged extension will report the CESID of the principle station. EAS agents 911 calls from an agent in an Expert Agent Selection (EAS) skill will report the CESID of the physical station, not the logical agent. Personal Station Access/Terminal Translation Initialization When you use Personal Station Access (PSA) or Terminal Translation Initialization (TTI) to associate a phone with another extension, the switch will report the CESID of the extension — not the physical phone associated with it. CO — Central Office CO trunks transmit dialed digits for outgoing calls but not for incoming calls. Use CO trunks when you want all incoming calls go to the same destination, such as an attendant or a voice menu system. Individual users can place outgoing calls
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1566 Trunks and Trunk Groups 20 without attendant assistance. CO trunks typically connect your switch to the local central office, but they can also connect adjuncts such as external paging systems and data modules. CPE — Customer-Provided Equipment Use CPE trunks to connect adjuncts, such as paging systems and announcement or music sources, to the switch. NOTE: You can connect some types of equipment to the switch by trunks without administering a CPE trunk group. For example, trunk port interfaces can be assigned on system screens for Music-on-Hold Access (Feature-Related System Parameters screen) or voice and chime paging (Loudspeaker Paging and Code Calling Access screen). DID — Direct Inward Dialing DID trunks carry incoming calls directly from the local central office to your switch. These trunks transmit the digits your switch needs to route incoming calls to specific extensions. Use DID trunks when you want people calling your organization to dial individual users directly without going through an attendant or some other central point. DIOD — Direct Inward/Outward Dialing DIOD trunks are two-way trunks that transmit dialed digits in both directions. Thus, use DIOD trunks when you want a two-way trunk group with the convenience of direct inward dialing for incoming calls. DIOD trunks are used mostly outside North America, and typically they connect the switch to a local central office. In North America, use tie trunks for applications that require two-way transmission of dialed digits. In the U.S., trunks that transmit digits in both directions are sometimes called “smart trunks” and are administered as T1 tie trunks. FX — Foreign Exchange An FX trunk is essentially a CO trunk that connects your switch directly to a central office outside your local exchange area. Use FX trunks to reduce long distance charges if your organization averages a high volume of long-distance calls to a specific area code.