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
Managing data calls 
437 Wideband Switching 
15
Typical uses
A typical video application uses an ISDN-PRI interface to DS0 1 through 6 of the 
line-side facility. Refer to Figure 14
.
Figure Notes
Figure 14. Wideband Switching Video Application
1. Video application
2. Port 1
3. Port 2
4. ISDN terminal adaptor
5. Line-side ISDN-PRI
6. DEFINITY ECS
7. ISDN trunk8. Network
9. DS0 24 D-channel
10. DS0 23 unused
11.DS0 1–6...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
438 Wideband Switching 
15
Endpoint applications
An endpoint application is the origination or destination of a wideband call. 
Endpoint application 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...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
439 Wideband Switching 
15
Non-signaling configuration
Wideband also can support configurations using non-signaling (non-ISDN-PRI) 
line-side T1 or E1 connections. The endpoints 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...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
440 Wideband Switching 
15
Guidelines and examples
This section examines wideband and its components in relation to the following 
specific customer usage scenarios:
nData backup connection
nScheduled batch processing
nPrimary data connectivity
nNetworking
Data backup connection
Using wideband for data transmission backup provides customers with alternate 
transmission paths for critical data in the...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
441 Wideband Switching 
15
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...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
442 Wideband Switching 
15
Given this facility list concept, the algorithms have the ability to search for trunks, 
by facility, in an attempt to satisfy the bandwidth requirements of a given 
wideband call. If one facility does not have enough available bandwidth to 
support a given call, or it is not used for a given call due to the constraints 
presented in the following section, then the algorithm...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
443 Wideband Switching 
15
Note that on a T1 facility, a D-channel is not considered a busy trunk and results 
in a facility with a D-channel always being partially contaminated. On an E1 
facility, however, a D-channel is not considered a busy trunk because H11 and 
H12 calls may still be placed on that facility; an E1 facility with a D-channel and 
idle B-channels is considered an idle facility.
H12...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
444 Wideband Switching 
15
N x DS0
For the N x DS0 multi-rate service, a trunk group parameter determines whether a 
floating or a flexible trunk allocation scheme is to be used. The algorithm to 
satisfy an N x DS0 call is either floating or flexible.
nFloating (Contiguous) — In the floating scheme, an N x DS0 call is placed 
on a contiguous group of B-channels large enough to satisfy the requested...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
445 Wideband Switching 
15
Glare and blocking
Glare prevention
Glare occurs when both sides of an ISDN interface select the same B-channel for 
call initiation. For example, a user side of an interface selects the B-channel for an 
outgoing call and, before the switch receives and processes the SETUP message, 
the switch selects the same B-channel for call origination. Since any single 
wideband call...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Managing data calls 
446 Wideband Switching 
15
Administering Wideband Switching
Before you start
You need a DS1 Converter circuit pack. Refer to the DEFINITY ECS System 
Description for more information on the circuit pack.
Instructions
To administer wideband switching:
1. On the Access Endpoint screen, administer all fields. 
Refer to ‘‘
Access Endpoint’’ on page 481 for more information.
2. On the PRI Endpoint screen,...