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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 1397 ISDN service 20 As an example of how ISDN is used in private- and public-network configurations , see the following figures. For example, ISDN can be used to connect a switch to a public-switched network, to other switches, and to computers: AT&T Switched Network Protocol DEFINITY ECS supports the AT&T Switched Network Protocol described in the TR41449 (for 4ESS to common carrier) and TR41459 (for 5ESS to CO) ISDN protocol standards as defined by AT&T. This protocol is used when the DS1 circuit pack is administered for Country Code 1, Protocol Version a. The AT&T Switched Network provides you with the following services. Access to AT&T Switched Network Services ISDN provides access to AT&T Switched Network Services. The definition of the Service Type field on the ISDN Trunk Group screen includes a table that outlines these switched-network services. An ISDN trunk group may be dedicated to a particular feature. Alternately, an ISDN call-by-call trunk group may provide Figure Notes 1. DEFINITY ECS 2. ISDN trunk3. Public switched network 4. Host computer
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1398 ISDN service 20 access to several features. For a description of the services accessible via ISDN (either via dedicated or call-by-call trunk groups), refer to ‘‘ Call-by-Call Service Selection’’ on page 1295. Call Identification Display ISDN Call Identification Display provides a transparent name and number display for all display-equipped telephones within an ISDN network. The feature is transparent in that the same information can be provided at all ISDN facilities. Telephones using this feature should be digital telephones with a 40-character alphanumeric display. The Merlin hybrid sets with 32-character displays (7315H and 7317H) also support this feature. ISDN Call Identification Display is provided in addition to the normal Telephone Display and Attendant Display features when the network supports end-to-end ISDN connectivity. When both ISDN and DCS display information are received, the switch can display either the DCS or ISDN call identification information. If only ISDN display information is received, information displays in ISDN format. The display fields that may be used for ISDN are: Name, Number, Miscellaneous Call Identification, and Reason for Call Redirection. The display information varies, depending on the type of call, how the call is handled (for example, whether it is redirected or not), and the information is available on the call. CPN/BN to Host Call Identification The CPN/BN to Host Call Identification enables CPN and BN information to be passed from the switch to the ISDN Gateway, so that the ISDN Gateway can forward the information to a host for data-screen delivery to agents in an ACD split. By delivering call-identification information such as CPN/BN and switch information such as the answering-agent’s extension to an adjunct network (ISDN Gateway), the adjunct automatically delivers data screens to agents for new calls and call transfers. The figure below shows a simplified diagram of a CPN- and BN-to-host arrangement. The ISDN Gateway is a UNIX or MSDOS computer connected to the switch on one side and to a host computer on the other side. The connection to the switch is over a synchronous interface with BX.25 protocol.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1399 ISDN service 20 Private network services In addition to providing access to switched-public networks, ISDN provides private-network services by connecting DEFINITY ECS in an Electronic Tandem Network (ETN), Distributed Communications System (DCS), or QSIG Network. This gives you more efficient private networks that support new integrated voice and data services. ETN, DCS, and QSIG networking services are provided as follows. ETN services DEFINITY Enterprise Communication Servers that function as tandem nodes in an ETN can be interconnected using DS1 trunking facilities with ISDN. All signaling between the tandem switches is done with ISDN D-channel and normal ISDN protocol. The ISDN can also be used to connect ETN tandem and main switches. In this case, the main switch collects all of the address digits from local users as well as users at other satellite and tributary switches, and originates a call over ISDN to the tandem switch. Figure Notes 1. ISDN trunk 2. SID/ANI 3. DEFINITY ECS 4. BX.25 5. ISDN Gateway6. Existing interface 7. Host computer 8. Telephone 9. ACD agent position 10. Data terminal r781861 CJL 060996
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1400 ISDN service 20 Automatic Alternate Routing (AAR) and Automatic Route Selection (ARS) are used with ISDN and DS1 trunking facilities to access ETN facilities. AAR and ARS are used to collect the dialing information for the call that is originated from the main switch. DCS services ISDN-PRI facilities can be used in a DCS arrangement whenever tie trunks are used to connect the DCS nodes. Most DCS features are not affected by ISDN-PRI. However, there is a minor impact on a few of the DCS features, as far as the functions that the local and remote switches perform. QSIG services QSIG networking provides compliance to the International Organization for Standardization (ISO) ISDN private-networking specifications. The QSIG Networking platform is supported over the ISDN Basic Call setup protocol. DEFINITY ECS supports QSIG Supplementary Services. Wideband Switching (ISDN-PRI only) Wideband Switching provides support for services that require large bandwidth, such as high-speed video conferencing. Wideband also supports multiple channel calls end-to-end. These services have traditionally been handled by dedicated facilities. With Wideband Switching, dedicated facilities are no longer a requirement for these large bandwidth services. Call-by-Call Service Selection Call-by-Call Service Selection allows the same ISDN trunk group to carry calls to a variety of services or facilities. Embodied in this feature is the ability to allocate usage. It provides significant flexibility for creating user-defined incoming and outgoing services and is used on any ISDN trunk group. Access to Software Defined Data Network With ISDN, the SDDN service may be accessed. SDDN provides virtual private-line connectivity via the switched public network. The services provided by SDDN include voice, data, and video applications. SDDN services complement the ISDN voice services. Access to Switched Digital International Switched Digital International (SDI) provides 64 kbps of unrestricted connectivity to international locations via the AT&T Switched Network. It is also the backbone for the AT&T International ISDN network. SDI complements the ACCUNET digital service already available to United States locations. This service can be accessed using Call-by-Call Service Selection. SDI provides economical high-speed data transfer to international locations.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1401 ISDN service 20 National ISDN-2 Services DEFINITY ECS supports National ISDN-2 (NI-2), which offers many of the same services as the AT&T Switched Network protocol. The NI-2 protocol is used when the DS1 circuit pack is administered for Country Code 1, Protocol Version b. NI-2 provides users with the following services: nCalling Line Identification nNon-Facility Associated Signaling (ISDN-PRI only) nD-Channel Backup (ISDN-PRI only) nWideband Switching (ISDN-PRI only) nCall-by-Call Service Selection Calling Line Identification Calling Line Identification for NI-2 is essentially Calling Party Number (CPN) identification, as previously described. Non-Facility Associated Signaling (ISDN-PRI only) Non-Facility Associated Signaling (NFAS) allows an ISDN-PRI T1 or E1 Interface D-channel (signaling channel) to convey signaling information for B-channels (voice and data) on ISDN-PRI T1 or E1 facilities other than the one containing the D-channel. See ‘‘ Facility and Non-Facility Associated Signaling’’ on page 1331 for more information. D-Channel Backup (ISDN-PRI only) D-Channel Backup is provided to improve reliability in the event of a signaling-link failure. See ‘‘ Facility and Non-Facility Associated Signaling’’ on page 1331 for more information. Wideband Switching (ISDN-PRI only) Wideband Switching for NI-2 is essentially the same as that of the AT&T Switched Network ISDN-PRI protocol. Call-by-Call Service Selection Call-by-Call Service Selection for NI-2 is essentially the same as that for the AT&T Switched Network ISDN-PRI protocol.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1402 ISDN service 20 ISDN interworking ISDN interworking allows calls to use a combination of both ISDN and non-ISDN trunking and station facilities. A non-ISDN trunking facility is any trunk facility supported by the system that does not use the ITU-T recommended Q.931 message set for signaling. Non-ISDN trunking facilities include facilities such as analog trunks, AVD DS1 trunks, and DS1 trunks with bit-oriented signaling (robbed-bit or common channel). DEFINITY ECS supports the conversion of ISDN signaling to non-ISDN in-band signaling and the conversion of non-ISDN in-band signaling to ISDN signaling for interworking purposes. A mixture of ISDN and non-ISDN signaling is required in order to provide end-to-end signaling when using different types of trunk or station facilities on a call. See the figure below for an example of interworking. In this example, a call for someone at Switch B comes into Switch A. Interworking allows the ISDN signaling of the call to be converted at Switch A to non-ISDN in-band signaling before the call forwards to Switch B. Even though the call comes into Switch A on an ISDN trunk, Switch A can send the call to Switch B over a non-ISDN trunk by converting the signaling information. The system provides accurate CDR billing information on calls that are not interworked. Accuracy of CDR billing information on interworked calls is equivalent to the accuracy provided by the public network. DEFINITY ECS supports sending a non-ISDN trunk name as the connected name. Therefore, a non-ISDN trunk name can be sent as the connected name even when a call starts out as an ISDN call but is interworked over non-ISDN trunks. Figure Notes 1. Call from network to Switch B 2. ISDN trunk 3. Switch A4. Non-ISDN trunk 5. Switch B
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1403 ISDN service 20 Call Identification Display Two types of identification numbers are provided with ISDN and may be used in the various types of displays used with ISDN. The two types of identification numbers are as follows: nCalling Party Number (CPN): A 0–15 digit DDD number associated with a specific station. When a system user makes a call that uses ISDN, that user’s CPN is provided by the system for ISDN. ISDN public-unknown numbering or ISDN private numbering forms are administered to create a 0–15 digit CPN from a local station number. nBilling Number (BN): The calling party’s billing number, which is provided to an inter-exchange network via Equal Access or Centralized Automatic Message Accounting (CAMA). This number is stored at either a local or network switch. If a customer is connected directly to the AT&T Switched Network, the BN is the customer’s billing number stored in that network. If the CPN is not provided on an incoming ISDN call, the network uses the BN for the station identification number. The following types of display information are provided with ISDN: nCalling Party’s Number The calling party’s number appears on the called party’s display. This number is provided only if the outgoing ISDN trunk group is administered to send the CPN, and if ISDN public-unknown numbering or ISDN private numbering forms are administered to create a CPN. On calls incoming to a system, the network may provide either the CPN or BN as the calling party’s number. Extensions and 12-digit international numbers display without dashes. Dashes are only used for 7-digit and 10-digit numbers when North American Area Code is enabled on the Dial Plan screen. nCalling Party’s Name The calling party’s name appears on the called party’s display. On calls generated from a DEFINITY ECS, the caller’s name is provided if the ISDN trunk group is administered to send the name to the network. On calls incoming to a DEFINITY ECS, the (public or private) network may provide the caller’s name. If the caller’s name is not available, the called party’s display shows “CALL FROM” instead, followed by the calling party’s number (if available). nConnected Party’s Number The connected party’s number appears on the caller’s display. On calls generated from a DEFINITY ECS, callers’ displays may show the digits dialed as the call is made. If the (public or private) ISDN network provides the connected party’s number, the calling party’s display is updated to show the connected party’s number. The format of the connected party’s number is the same as that of the calling party’s number described previously on
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1404 ISDN service 20 calls incoming to a DEFINITY ECS. The 0–15 digit number of the party who answers the call is provided to the ISDN network only if the incoming ISDN trunk group is administered to send connected number to the network and ISDN public-unknown numbering or ISDN private numbering forms are administered to create a CPN. NOTE: The connected party may be the party actually called, in the event the call is transferred before the connected party answers the call. nConnected Party’s Name The connected party’s name appears on the calling party’s display. On calls generated from a DEFINITY ECS, the (public or private) ISDN network may provide the connected party’s name to the DEFINITY ECS, when the call is answered. If the connected party’s name is not available, the calling party’s display shows ANSWERED BY, followed by the connected party’s number (if available). On calls incoming to a DEFINITY ECS, the connected party’s name is provided if the incoming ISDN trunk group is administered to send the name to the network. Depending on how the switches involved in a call are configured, parties may see none, some, or all the information described above. Displays for redirected calls Features such as Call Coverage, Call Forwarding All Calls, Bridged Call Appearance, or Call Pickup redirect calls from the called party’s extension to some other destination. Once the redirected call has been connected at its new destination, the displays for the calling, called, and connected parties are as follows: — Calling Party Display a= CONNECTED NAME CONNECTED NUM MISCID — Called Party Display This is the display of the party the caller originally dialed. If this party bridges onto the redirected call after it has been answered, they see: a= CONFERENCE 2 In this situation, the connected party’s display (see below) shows the same information. The calling party’s display is also updated if the calling and called parties are on the same switch.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1405 ISDN service 20 — Connected Party Display The connected party is the party who answers the redirected call. a= CALLING ID to CALLED ID R The R indicates the reason for redirection. The CALLING ID and the CALLED ID may be the name or the number, depending on the information received from the far end. Displays for conference calls Both terminal and attendant conference calls are identified as calls with “n” number of conferees. This display information generates locally and does not change the display on another switch. If the conference call eventually drops back to a two-party call, the original display information is restored. However, when two DCS and/or ISDN calls (or any possible combination of each) are conferenced and revert to a two-party call, the trunk group of the remaining call displays. Displays for calls to hunt groups On ISDN calls to a hunt group extension, the caller’s display identifies either the name of the hunt group or the name of the group member who answers the call, depending on hunt group administration. Displays for calls to Terminating Extension Groups (TEG) On ISDN calls to a TEG, the caller’s display identifies either the group or the group member who answers the call, depending on administration. Caller Information Forwarding With CINFO you can use a vector collect digits step to retrieve caller entered digits (ced) and customer database-provided digits (cdpd) supplied by the network in an incoming call’s ISDN SET UP message. ISDN is required if the CINFO comes from the network. Facility Restriction Level and Traveling Class Mark The TCM used to pass on the originating facility’s FRL is sent by ISDN facilities in the SETUP message only if the trunk services type is tandem. Information Indicator Digits (II-digits) With II-digits you can make vector-routing decisions based on the type of the originating line. II-digits are provided for an incoming call by ISDN-PRI. It is a generally available ISDN AT&T Network service.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1406 ISDN service 20 Malicious Call Trace (MCT) ISDN calling number identification is sent when MCT notification is activated on an ISDN trunk. Multiple Subscriber Number (MSN) - Limited The ISDN standard MSN feature lets you assign multiple extensions to a single BRI endpoint. A side effect of supporting the NT interface is the MSN feature works with BRI endpoints allowing the Channel ID IE to be encoded as “preferred.” The endpoint must be administered as the far end of an NT-side ISDN-BRI trunk group. Also, you must use the Uniform Dial Plan (UDP) feature to assign the desired extensions to the “node” at the far end of the trunk group. Overlap Sending You can administer overlap sending on AAR and ARS calls routed over ISDN trunk groups. This allows you to send and receive digits one digit at a time instead of enbloc. (With enbloc, digits are not sent until the entire group of digits is received). Interactions nAustralia Malicious Call Trace A DEFINITY ECS with a BRI connection to the Australian public network is able to notify the network if a user in a private network invokes the Malicious Call Trace feature. This works on Australian national connections. nDirect Inward Dialing Some public network operators may not offer full Direct Inward Dialing service on BRI trunks, but instead may offer the BRI equivalent, which typically is called Multiple Subscriber Number (MSN). This is the case if the public network treats the BRI as an endpoint interface rather than a trunk group interface. In such a case, the network only routes up to 10 public numbers to a particular pair of BRI trunks. Furthermore, the network may not let calls overflow from one BRI trunk to another. nD-Channel Backup D-Channel Backup is not supported on BRI connections. nDistributed Communications System If both DCS and ISDN features are provided over the same facility with a DEFINITY ECS, DCS displays generally override ISDN displays. However, with DEFINITY ECS, the ISDN connected name and number