Reference Guide
IMACS System Release 5.1.9
2-15
Applications
Data Modules and Applications
2.3.5.1
BRI Card Models
In both cases, leased line and BRITE, B channels carrying voice traffic on the BRI card can
be compressed through the ADPCM card to extend the user’s resources. The only limitation
on BRI traffic is that NTUs or NT1s must be located less than 18,000 feet from the system
unit. All BRI cards are built to GR-1089 specifications.
The 826070 BRI “U” Card has software configurable mode operation of LT and NT. It
supports up to eight leased or BRI terminal extension (BRITE) applications. The 826070 does
not support sealing current.
The 826171 BRI “U” Card has all of the functionality of the 826070, however, switching
between the LT and NT modes must be done by making a menu selection and changing jumper
connections on the card. Also, the 826171, unlike the 826070 card supports a user
configurable sealing current of 7.5mA or 15.0mA.
The 826270 BRI Card “S/T” Card is designed to support “S/T” 4-wire interface applications.
This card provides TE, NT1 and NT2 emulation and is commonly used to provide remote
extension of four-wire BRI CPE devices from an ISDN PBX.
The 826x70 series of BRI cards are also designed to support external timing part of the
standard functionality. All BRI cards support extensive built in diagnostics and tests. Loop
backs can be generated on a per channel basis, with choice of loop back generation mode and
loop back codes. Built in BERT tests include off, mark, space, 1:1. 1:7, p_1, p_0, p_1:1, p_1:7.
In addition to all of the software configurable options on the BRI card itself, the BRI card has
the ability to remotely manage up to eight NTUs. The NTUs DTE interface type, data rate and
asynchronous baud rate are a few options that are configurable through the BRI card interface.
This further enhances network manageability by accessing all ISDN equipment from a single
platform.
2.3.6
DSO-DP Card (825460)
The 825460 DSO Data Port/G.703 Data Unit (DSO-DP/G.703) is a plug-in user card for the
system. The DSO-DP/G.703 provides a 64 Kbps interface to a DSO of a T1/E1 network. The
card supports four (4) ports each of which provide a 64 Kbps interface to a DSO on a T1 or
E1 WAN link. Each DSO-DP/G.703 card can be installed in any User Slot and provides four
(4) DB15 female connectors.
The DSO-DP/G.703 card can be programmed to operate in either DSO-DP mode or in G.703
mode. In G.703 mode, the card supports either co-directional or contra-directional operation
and that option is set-able on a port-by-port basis. In DS0-DP mode, in addition to Transmit
Data and Receive Data, the card can be programmed to either provide a 64 Kbps bit clock and
an 8 kHz byte clock to the attached device or to receive those two clocks from the attached
device.
