Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Instructions Manual

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Features and technical reference 
1597 Whisper paging 
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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. 
						

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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. 
						

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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 
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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.) 
						

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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 
						

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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 
						

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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. 
						

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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. 
						

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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 
						

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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.