Accunet Spectrum Of Digital Services (Asds) - Avaya 6424D+M User Manual

DEFINITY Communications System
DEFINITY High Speed Link
User´s Guide
Network Service
Requirements
Appendix D: Applications and Switch Administration
Administered Connection (AC) — ACs are available on the
DEFINITY Generic 3 and are similar to PSCs in that they are
dialed data calls that remain connected for long periods of
time. The AC, however, offers enhanced features over PSCs as
well as DSCs such as scheduled connections, automatic call
restoration, administrable alarming of failed calls, and
administrable retry intervals. ACs can be used to establish
connections across a network and connect to access endpoints
such as DSUs.
In multiple switch configurations where the AC, PSC, and/or DSC
features are available for establishing a permanent connection,
ACs should be used since they provide the most functionality. If a
switch with the AC feature is not available the next preference
should be a PSC. Since a DSC can only be used to support
connections between ports on a switch, a DSC should only be
used when there is no other option (for example, when the
connection involves multiple System 85s or Generic 2s).
For more information regarding each of these options, refer to the
appropriate feature description manuals.
Switch Hardware
The switch hardware requirements for permanent connections are
essentially the same as those for switched connections. Refer to
Switch Hardware section in the Switched Applications portion of
this Appendix for a description of this hardware.
Switch Software
Depending on how permanent connections are implemented on
the switch, AAR software may be required.

ACCUNET Spectrum of Digital Services (ASDS)

ASDS is AT&T's private line digital service that provides a
permanent circuit from POP (Point-of-Presence) to POP. These
connections are not dialed but are physically connected at all
times.
When configuring a network with ASDS the following should be
noted:
In a PBX to PBX connection, robbed-bit signaling is used by the
switch to monitor the status of the connection. To support this
capability through the ASDS Network, ASDS should be
ordered as a tie line with trunk conditioning. This will allow
ASDS to maintain the integrity of the frames that pass through,
allowing robbed-bit signaling to function properly. With this
arrangement only full-duplex 56 Kbps data transmission is
supported. Furthermore, since the switch monitors the
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