Lucent Technologies 8.2 User Manual
DEFINITY ECS Release 8.2
Administrator’s Guide
Administrator’s Guide
555-233-506
Issue 1
April 2000
Managing data calls
424
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.
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
signaling into a form that can be used by the endpoint application and vice versa.
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.
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.
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.
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.
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.
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 an including
6 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 always are selected unless one or more B-channels are not
in service.
a width 6 (six DS0s) can handle a call of one channel (64 Kbps) up to an including
6 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 always are selected unless one or more B-channels are not
in 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.
extensions) within a single facility. Non-overlapping contiguous sets of DS0s
(B-channels) are associated with each PE.
Universal digital signaling level 1 circuit pack
The UDS1 circuit pack is the interface for line-side and network facilities carrying
wideband calls.
wideband calls.