ISDN Interfaces
RBSU/RBSS and TBSU Interface Units
Strata DK I&M 6/00
16-25
ISDN
Inte
rface
s
DK BRI Circuit EMC Ferrite Core Requirement
To ensure that the DK BRI circuit meets the EMC requirements, it is necessary to run all wire
connecting ISDN BRI circuits (TE, LT mode and NT mode) through a Ferrite core. Use Toshiba
part number, FER-CORE-ISDN, to order the ferrite core. It is not shipped automatically with the
BRI circuit cards, it must be grounded separately.
show how to dress the
wiring through the Ferrite core.
Connecting TBSU and RBSU to Network Side (TE-Mode)
The TBSU and RBSU only, not the RBSS, circuits can be connected to the network side of a BRI
line. The TBSU and RBSU circuits must be configured in the TE-mode (refer to option switches in
and Program *60).
In the U.S., the BRI line from the ISDN service provider is a two-wire U-type BRI line. This line
connects to the TBSU or RBSU TE circuit via a customer-provided NT1 as shown in
. The NT1 is necessary to convert the network BRI, two-wire, U interface to the TBSU or
RBSU BRI, four-wire, T interface. The NT1 must be UL listed (U.S.) or CSA certified (Canada).
The NT1 is powered by local AC power via an AC adapter supplied with the NT1. The connection
between the NT1 and the TBSU or RBSU TE circuit is a point-to-point connection, so the NT1 can
connect to only one TBSU or RBSU BRI TE circuit.
A 100-ohm Terminating Resistor (TR) is required on each end of the point-to-point connection.
The TR must be switched into the TBSU or RBSU TE circuit (refer to option switches in
) and into the NT1 device.
Figure 16-15
BRI Circuit Ferrite Core Installation
Figure 16-16
BRI Circuit Ferrite Core Installation
RBSU or RBUU
4697
Ferrite Core
FER-CORE-ISDN
One Turn
CAT 3, 4,
or 5 Cable
Tie
Wrap
Note:
RBSS or RBUS
Locate the Ferrite core
as close as possible to
the BRI modular jack.
ISDN
PRI Jack
TBSU1A
or TBUU
FS
LOS
TS
BSY
FS
LOS
TS
BSY
Ferrite Core
FER-CORE-ISDN
One
Turn
CAT 3, 4,
or 5 Cable
Tie Wrap
Note:
Locate the Ferrite core
as close as possible to
the TBSU or TBUU.
4729
Summary of Contents for Strata AirLink DK40i
Page 22: ...Introduction Related Documents Media xx Strata DK I M 6 00 ...
Page 48: ...DK14 Installation DK14 Wiring Diagrams 1 26 Strata DK I M 6 00 ...
Page 220: ...DK424 Installation Remote Cabinet Installation Instructions 5 68 Strata DK I M 6 00 ...
Page 262: ...DK424i Configuration Primary Reserve Power Cabinet Hardware 6 42 Strata DK I M 6 00 ...
Page 450: ...Universal Slot PCB Wiring Option Interface PCB Wiring Diagrams 10 42 Strata DK I M 6 00 ...
Page 592: ...Peripheral Installation Enhanced 911 Service E911 12 84 Strata DK I M 6 00 ...
Page 616: ...ACD Installation Spectrum Electronic Wall Boards 13 24 Strata DK I M 6 00 ...
Page 634: ...Fault Finding Fault Isolation Flowcharts 14 18 Strata DK I M 6 00 ...
Page 704: ...ISDN Interfaces ISDN Disconnect Cause Code 16 54 Strata DK I M 6 00 ...