ATT DEFINITY Communications System Generic 3 Instructions Manual

Integrated Services  Digital  Network (ISDN) — Basic 
Rate Interface (BRI)
Issue  3   March 1996
3-797
Administered Connections
An Administered Connection is an end-to-end connection between two access 
endpoints or d ata endpoints that is automatically established by the system 
whenever the system is restarted or the Administered Connection is a dministered 
and the Administered Connection is due to be active. The attributes of these 
connections are user-defined and administered on the “Administered...

Feature Descriptions
3-798Issue  3   March 1996 
These functions require a change in the Bearer Cap a bility after the 
establishment of the call, which is currently not allowed by the BRI 
protocol.
nFeatures that use the switchhook and Recall button (for example, Call 
Waiting and Analog Conference/Transfer/Hold/Drop) are a p plicable to 
analog voice terminals only
The DEFI NI TY s yst em  s u pports BRI data endpoints that perform layer 2 
disconnect. BRI data endpoints that support layer 2...

Integrated Services  Digital  Network (ISDN) — Basic 
Rate Interface (BRI)
Issue  3   March 1996
3-799
nModem Poolin g
The Modem Pooling feature provides the necessary protocol conversion 
between Mode 2 digital data endpoints and analog data facilities. A 
modem pool resource needs to be inserted by call processing during call 
setup for both call origination and c all answering. This resourc e translates 
data between DMI Mode 2 protocol used by BRI data endpoints and the 
modulated signal used by the...

Feature Descriptions
3-800Issue  3   March 1996 
1. Endpoint Initialization: If the BRI terminal supports endpoint 
initialization, the administrator has to enter the SPID value. The 
default value is the extension; however, the value can be changed 
at the time of a dministration. The SPID can be up to 10 digits, and 
uniquely identifies the terminal on the BRI. The SPID on the 
“ Administration”  form and the SPID programmed into the endpoint 
must be the same. (Refer to the terminal’s user manual in...

Integrated Services  Digital  Network (ISDN) — Basic 
Rate Interface (BRI)
Issue  3   March 1996
3-801
capability. If you are using supported end p oints (7500 and ADM), you should not 
change the d efault values. Changing the default values with the MIM 
Maintenance/Management support o ption as ‘‘y’’ has no effect on modem 
pooling. These endpoints support the MIM query capability, which enables the 
switch to query the endpoint when a call arrives.
Default Data Ap p lication specifies the default data...

Feature Descriptions
3-802Issue  3   March 1996 
Integrated Services Digital Network
(ISDN) — Primary Rate Interface
Feature Availability
ISDN-PRI is an optional feature that can be purchased with any Generic 3 
releases except G3vs/G3s ABP. 
Description
Allows connection of the system to an Integrated Services Digital Network (ISDN) 
by using a standard ISDN frame format called the Primary Rate Interface (PRI). 
The ISDN gives the system users access to a variety of public and private 
network services...

Integrated Services  Digital  Network (ISDN) — Primary 
Rate Interface
Issue  3   March 1996
3-803
NOTE:
For G3r, the D-channel information can only use the TN464C (or later 
version) circuit pack; TN767 can be used for NFAS interfaces carrying only 
B-channels, but not for ISDN signaling information (D-channel).
With the ISDN-PRI, the system can interface with a wide range of other products 
including network switches, PBXs, and host computers. These products include 
the following:
nPublic Network...

Feature Descriptions
3-804Issue  3   March 1996 
Figure 3-21. ISDN-PRI Public Network Configuration
AT&T Switched Network Protocol
The AT&T Switched Network Protocol is an ISND-PRI protocol that uses 4ESS 
implementation. The DEFI NIT Y syst em  ISDN-PRI implementation is consistent 
with the ITU-T Recommendation Q.931 and Q.921 for ISDN signaling. The AT&T 
Switc h ed  Network provides system users with the following services:
nAccess to AT&T Switched Network Services (for example, SDN, MEGA, 
etc.)...

Integrated Services  Digital  Network (ISDN) — Primary 
Rate Interface
Issue  3   March 1996
3-805
Access to AT&T Switched Network Services
ISDN-PRI pro vides access to AT&T Switched Network Services such as SDN 
(Software Defined  Network), SDDN (Software Defined Data Network), 
MEGACOM, etc. An ISDN-PRI trunk group may be dedicated to a particular 
feature. Alternately, an ISDN-PRI call-b y-call trunk group may provide access to 
several features. For a description of the ASN services accessible via...

Feature Descriptions
3-806Issue  3   March 1996 
Prefix”  form is a dministered to c reate a CPN. For G3vs/G3sV1, G3iV1, and 
G3rV1, the Calling Party number, if sent, is always 10 digits long. On calls 
incoming to a system, the network may provide either the CPN or BN as 
the calling party’s numb er.  Exc ept for G3i-Global, dashes are inserted in 
the displayed number between the area code (if shown), the office code, 
and the local number. Extension numbers and 12-digit international 
numbers are...