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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 Features and technical reference 1597 Whisper paging 20 Speakerphones When a call is on the speaker, an incoming whisper page is heard over the speaker too. When the group listening feature on a 6400-series phone is active, an incoming whisper page is heard on both the handset and the speaker. Interactions nAttendant Attendants cannot intrude on a whisper page. If an attendant is using intrusion to talk to a user, that user cannot receive a whisper page. An attendant may initiate a whisper page while a call is split away using auto-manual splitting. However, they cannot use Release, Hold, or Split after the page is made. nBridged Call Appearances Whisper pages are designed to reach a specific user associated with a specific extension. — When an extension and one or more of its bridged appearances are in use, parties on the bridged appearances hear the tone that signals an incoming whisper page but only the user on the principle extension hears the announcement. Only the display on the principle extension shows the whisper page message. — When all appearances are idle or only a bridged appearance is in use, a whisper page rings the principal extension with priority ringing and the display indicates an incoming priority call. — If a user makes a whisper page on a call appearance that is a member of a bridge group, then no others users in the bridge group can connect to the call while the whisper page intrusion is active. nBusy Verification You can’t make a whisper page to an extension while it’s being busy-verified. You can’t busy-verify an extension while it’s making or receiving a whisper page. nCalling Restrictions — Origination Phones with this restriction cannot make whisper pages. nCalling Restrictions — Termination Phones with this restriction cannot receive whisper pages.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1598 Whisper paging 20 nClass of Restriction (COR) A station user must have a COR that allows for station-to-station calling in order to perform Whisper Paging to a member outside of their own COR. Calling and called party restrictions also determine which extensions can make and receive whisper pages. nConference Everyone on a conference call hears the tone that signals an incoming whisper page. But only the owner of the paged extension hears the page, and only the display on that phone shows the whisper page message. If a conference call already has the maximum number of parties and trunks allowed, you cannot make a whisper page to any of the participants. Parties cannot be added to a conference call if an active whisper page is on the call. nData Privacy — Permanent or Temporary Any station that has Data Privacy activated cannot make a whisper page. nExpert Agent Selection You can’t make a whisper page by dialing an agent’s Logical Agent ID. Pages must be made to a physical extension. nGo to Cover If you make a whisper page and then press your Go To Cover button while the page is in progress, the Go To Cover button doesn’t work. The opposite is true as well. If you activate Go to Cover and then press the whisper page activation button, you aren’t able to make a whisper page. nLast Number Dialed When you make a whisper page, it’s tracked as the last number dialed. nQSIG This feature does not operate in a QSIG environment. nRemote access You can’t make a whisper page by remote access. Both the paging party and paged party must be on the same switch or the attempt is denied.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1599 Whisper paging 20 nTenant Partitioning Whisper paging is permitted across tenant partitions if the assigned classes of restriction allow for intercom calling between members of different partitions. This feature is especially useful to attendants who serve multiple partitions. NOTE: It is important for system administrators to ensure that this feature is managed appropriately in systems with tenant partitioning. Some tenants may not want other tenants to interrupt their calls. nTransfer A call cannot be transferred during an active whisper page. nVector Directory Number (VDN) You can’t make a whisper page to a VDN. Pages must be made to a physical extension. Related topics Refer to ‘‘ Paging users who are on active calls’’ on page 398 to administer whisper paging.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1600 Wideband Switching 20 Wideband Switching (Not available with Offer B) Wideband Switching provides the ability to dedicate 2 or more ISDN-PRI B-channels or DS0 endpoints for applications that require large bandwidth. It provides high-speed end-to-end connectivity between endpoints where dedicated facilities are not economic or appropriate. ISDN-BRI trunks do not support wideband switching. Brief description ISDN-PRI (and the emulation of it by Asynchronous Transfer Mode-Circuit Emulation Service (ATM-CES)) divides a T1 or E1 trunk into 24 (31 for E1) information channels and one signaling channel for standard narrowband communication. Certain applications, like video conferencing, require greater bandwidth. You can combine several narrowband channels into one wideband channel to accommodate the extra bandwidth requirement. DEFINITY ECS serves as a gateway to many types of high-bandwidth traffic. Wideband switching is also supported by the Expansion Interface (EI) circuit pack and the DS1 Converter circuit pack (for Center Stage Switching or directly connected port networks) and the ATM-EI circuit pack (for Asynchronous Transfer Mode connected port networks). ATM-CES supports wideband switching only for access, tie, and tandem trunks, not for line-side connections. Wideband Switching supports: nHigh-speed video conferencing nWAN disaster recovery nScheduled batch processing (for example, nightly file transfers) nLAN interconnections and imaging nOther high bandwidth applications involving high-speed data transmission, video transmission, etc. How to administer Wideband Switching The following list shows the required screens you must to set up Wideband Switching: nAccess Endpoint nPRI Endpoint nISDN trunk group nRoute Pattern nFiber Link Administration (Optional: refer to the DEFINTY services documentation for information about this screen.)
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1601 Wideband Switching 20 Channel allocation For standard narrowband communication, ISDN-PRI divides a T1 or E1 trunk as follows: nT1 trunks are divided into 23 information channels and 1 signaling channel nE1 trunks are divided into 30 information channels, 1 signaling channel, and 1 framing channel Certain applications, like video conferencing, require greater bandwidth. You can combine several narrowband channels into one wideband channel to accommodate the extra bandwidth requirement. DEFINITY ECS serves as a gateway to many types of high-bandwidth traffic. In addition, DS1 converters are used for wideband switching at remote locations. The following table provides information on Wideband Switching channel types. Perform wideband line-side channel allocation using one of three allocation algorithms: fixed, flexible, or floating. nFixed allocation — Provides contiguous-channel aggregation. The starting channel is constrained to a predetermined starting point. (Used only for H0, H11, and H12 calls.) nFlexible allocation — Allows a wideband call to occupy noncontiguous positions within a single T1 or E1 facility. nFloating allocation — Enforces contiguous-channel aggregation. The starting channel is not constrained to a predetermined starting point. Channel Type Number of Channels Data Rate H0 6 384 Kbps H11 24 1536 Kbps H12 30 1920 Kbps NXDS0 (T1) 2-24 128–1536 Kbps NXDS0 (E1) 2-31 128–1984 Kbps
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1602 Wideband Switching 20 Typical uses A typical video application uses an ISDN-PRI interface to DS0 1 through 6 of the line-side facility. Refer to the following figure. Figure Notes Endpoint applications with signaling An endpoint application is the origination or destination point of a wideband call. Endpoint applications can be any number of data applications based on the customer’s particular needs. ISDN-PRI terminal adapters For wideband switching with non-ISDN-PRI equipment, you can use an ISDN-PRI terminal adapter. ISDN-PRI terminal adapters translate standard ISDN signaling into a form that can be used by the endpoint application and vice versa. 1. Video application 2. Port 1 3. Port 2 4. ISDN terminal adaptor 5. Line-side ISDN-PRI 6. DEFINITY ECS 7. ISDN or ATM-CES trunk8. Network 9. DS0 24 D-channel 10. DS0 23 unused 11. DS0 1–6 wideband 12. DS0 24 D-channel 13. DS0 7–23 narrow bands 14. DS0 1–6 wideband wdbndex CJL 061996
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1603 Wideband Switching 20 The terminal adapter also must adhere to the PRI-endpoint boundaries as administered on the DEFINITY ECS switch when handling both incoming (to the endpoint) applications and outgoing calls. The terminal adapter passes calls to and receives calls from the line-side ISDN-SETUP messages indicating the data rate and specific B-channels (DS0) to be used and communicates all other call status information via standard ISDN messages. Refer to DEFINITY Line-Side ISDN Primary Rate Interface Technical Reference for more information. Line-side (T1 or E1) ISDN-PRI facility A line-side ISDN-PRI (T1 or E1) facility is comprised of a group of DS0s (24 for a T1 facility and 32 for an E1 facility). In this context, these DS0s are also called channels. T1 facilities have 23 B-channels and a single D-channel. E1 facilities have 30 B-channels, 1 D-channel, and a framing channel. Data flows bi-directionally across the facility between the switch and the ISDN-PRI terminal adapter. PRI-endpoints A PRI-endpoint (PE) is a combination of DS0 B-channels on a line-side ISDN-PRI facility that has been assigned an extension. A PRI-endpoint can support calls of lower bandwidth. In other words, a PE having a width 6 (six DS0s) can handle a call of one channel (64 Kbps) up to and including six channels (384 Kbps). Also, a PE can support calls on non-adjacent channels. For example, an endpoint application connected to a PE defined as using B-channels 1 through 6 of an ISDN-PRI facility could originate a call using B-channels 1, 3, and 5 successfully. If the PE has been administered to use flexible channel allocation, the algorithm for offering a call to the PE starts from the first DS0 administered to the PE. Since only one active call is permitted on a PE, contiguous B-channels are always selected unless one or more B-channels are not in service. A PE remains in service unless all of its B-channels are out of service. In other words, if B-channel 1 is out of service and the PE is five B-channels wide, the PE could still handle a wideband call of up to four B-channels in width. A PE can only be active on a single call at any given time; that is, it is either considered idle, active (busy), or out of service. One facility can support multiple separate and distinct PRI-endpoints (several extensions) within a single facility. Non-overlapping contiguous sets of DS0s (B-channels) are associated with each PE.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1604 Wideband Switching 20 Universal digital signal level 1 board The UDS1 board is the interface for line-side and network facilities carrying wideband calls. Non-signaling endpoint applications Wideband can also support configurations using non-signaling (non-ISDN-PRI) line-side T1 or E1 facilities. The endpoint applications are the same as those defined for configurations with signaling. Data service unit/channel service unit This unit simply passes the call to the endpoint application. Unlike terminal adapters, the DSU/CSU does not have signaling capability. NOTE: No DSU/CSU is needed if the endpoint application has a fractional T1 interface. Line-side (T1 or E1) facility This facility, like the ISDN-PRI facility, is composed of a group of DS0s (23 for a T1 facility and 30 for an E1 facility). Line-side facilities are controlled solely from the switch. Through the access-endpoint command, a specific DS0 or group of DS0s is assigned an extension. This individual DS0 or group, along with the extension, is known as a wideband access endpoint (WAE). Wideband access endpoint WAEs have no signaling interface to the switch. These endpoints simply transmit and receive wideband data when the connection is active. NOTE: The switch can determine if the connection is active, but this does not necessarily mean that data is actually coming across the connection. A WAE is treated as a single endpoint and can support only one call. If all DS0s comprising a wideband access endpoint are in service, then the wideband access endpoint is considered in service. Otherwise, the wideband access endpoint is considered out of service. If an in-service wideband access endpoint has no active calls on its DS0s, it is considered idle. Otherwise, the wideband access endpoint is considered busy. Multiple WAEs are separate and distinct within the facility and endpoint applications must be administered to send and receive the correct data rate over the correct DS0s. An incoming call at the incorrect data rate is blocked.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1605 Wideband Switching 20 Guidelines and examples This section examines wideband and its components in relation to the following specific customer usage scenarios: nHigh-speed video conferencing nData backup connection nScheduled batch processing nPrimary data connectivity nNetworking High-speed video conferencing All data rates are multiples of 64 Kbps; from 128 Kbps to 1,536 Kbps (T1) and 1,984 Kbps (E1) are supported. Key customer data rates are listed below. Data backup connection Using wideband for data transmission backup provides customers with alternate transmission paths for critical data in the event of primary transmission path failure. Scheduled batch processing. Scheduled batch processing applications are used for periodic database updates (for example, retail inventory) or distributions (for example, airline fare schedules). These updates are primarily done after business hours and are often referred to as nightly file transfers. Wideband meets the high bandwidth requirements at low cost for scheduled batch processing. In addition, wideband allows the dedicated-access bandwidth for busy-hour switch traffic to be used for these applications after business hours; no additional bandwidth costs are incurred. The non-ISDN backup data connection is also appropriate for scheduled batch processing applications. Administered Connections are used to schedule daily or weekly sessions originating from this application. Ta b l e 9 6 . Channel Type Number of Channels Data Rate H0 6 384 Kbps H11 24 1536 Kbps H12 30 1920 Kbps NXDS0 (T1) 2-24128–1536 Kbps NXDS0 (E1) 2-31 128–1984 Kbps
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1.1 June 2000 Features and technical reference 1606 Wideband Switching 20 Primary data connectivity. Permanent data connections (those always active during business hours), such as interconnections between local area networks (LANs), are well suited for DEFINITY ECS when ISDN-PRI endpoints are used. The ISDN end-to-end monitoring and the endpoint’s ability to react to failures provide for critical data availability needs. With ISDN, endpoints can detect network failures and initiate backup connections through the switch; ISDN endpoints can also establish additional calls when extra bandwidth is needed. Any failures not automatically restored by DEFINITY ECS are signaled to the endpoint application, which can initiate backup data connections over the same PRI endpoint. DEFINITY ECS routes the backup data connections over alternate facilities if necessary. Networking All of the wideband networking is over ISDN-PRI facilities (and the emulation of them by ATM-CES) but may connect to a variety of networks, other domestic interexchange carriers’ services, private line, RBOC services, and services in other countries. ISDN-PRI trunk groups and channel allocation Only ISDN-PRI trunks (and the emulation of them by ATM-CES) support wideband calls to the network. Wideband’s bandwidth requirements have necessitated modification of the algorithms by which trunks look for clear channels. The following section describes the search methods and their relationship to the available wideband data services. Facility lists A wideband call accessing the network must reside on a single ISDN-PRI facility. Trunks within a trunk group must be organized based on the facility on which they reside. This is accomplished by compiling a facility list as trunks are administered to a trunk group; if a trunk is added to a trunk group from a facility not already on that trunk group’s list, that facility is added to the list in an order based on the facility’s signaling group number and interface identifier. In other words, the facility list is compiled in an ascending order based first on signaling group number and second on the interface identifier assigned to the facility within the signaling group. For example, if three facilities having signaling group/interface identifier combinations of 1/1, 1/2, and 2/1 were associated with a trunk group, then a call offered to that trunk group would search those facilities in the order as they were just listed. Also note that since trunks within a given facility can span several trunk groups, a single facility can be associated with several different trunk groups.