Zhone Technologies, Inc. | IMACS Product Book, Version 4 |
5. BRI Card
The 826xxx line of BRI Cards offers industry standard ISDN BRI “U” or “S/T” Interfaces. Each BRI Card supports eight BRI “U” Interfaces for long line circuit provisioning, or “S/T” Interface for local provisioning. The BRI Interface provides two bearer and one data channel over two wires (1 pair). The S/T interface provides the same functionality over
The Basic Rate Interface “U” Interface card offers connectivity to sites located up to 18,000 feet from the integrated access system. This distance is influenced by factors such as wire gauge, bridge tap and loading patterns as described in ANSI
Either protocol allows the IMACS to extend the reach of an ISDN PBX hundred of miles away from the location of the PBX switch as shown in Figure 16. All services are passed to the remote location with no restrictions, enabling the end user or agent to use all PBX functionality as if they were locally attached to the switch. Management of this solution is transparent to the PBX programmer. All remote extensions are treated as if they are local connections.
No special programming or management is necessary. For example, if there was an ISDN switch located in San Francisco, ISDN capabilities could be transparently transported across the network to a remote call center or other customer in San Ramon. There is no technical limit once connected to the network; service could be as far away as New York.
ISDN Terminal Extension
NT1
“U”
IMACS with
BRITE card
| San Francisco |
T1 | Central Office |
|
“U”
ISDN Switch
NT1
18k ft ISDN 
Service Limit
T1
ISDN Service Area Extension
NT1
“U”
IMACS with
BRITE card
San
Ramon
CO
Figure 16 - IMACS BRI Terminal Extension Application
March 2001 | Page 57 |