Primary Rate Isdn Interface - Allied Telesis AT-AR020 PRI E1/T1 Hardware Reference Manual

20
your switch or router has detailed descriptions of the two operational modes.
The switch or router should be configured as a TE for normal operation.
For the AT-AR021(S) BRI-S/T PIC, the termination provided by the interface
may also be determined by jumpers mounted on its board. The jumpers are
normally removed as the building wiring will provide the correct termination
for an ISDN TE-to-NT circuit.
When the BRI is connected in a point-to-point configuration, the jumpers may
need to be installed to terminate the line pairs with internal 100Ω resistors. See
"AT-AR021(S) BRI-S/T PIC" on page 7
The Integrated Services Digital Network (ISDN) chapter of the Software Reference
or Reference Manual for your switch or router has additional information. The
pinout of the BRI interface is shown in
If you are unsure of whether to terminate the line or not, contact your ISDN
service provider or your Authorised Allied Telesyn distributor or reseller.
Table 12: Pinout of the Basic Rate ISDN interface
Pin S/T Interface Functions
1 -
2 -
3 TX+
4 RX+
5 RX-
6 TX-
7 -
8 -

Primary Rate ISDN Interface

The AT-AR020 PRI E1/T1 PIC provides a Primary Rate ISDN interface with a
single RJ-45 connector. The interface supports connection to either 100Ω T1 or
120Ω E1 networks.
Table 2 on page 7 lists the network jumper settings for the different network
types.
Table 13: Connection standard for Primary Rate ISDN RJ-45 connectors
Pin* Signal
1 RX+
2 RX-
3 RX ground selection from jumper
4 TX+
5 TX-
6 TX ground selection from jumper
7 Not connected
8 Not connected
*Pins are numbered from left to right, with latch down, as viewed from the rear.
Port Interface Card
for locations and names of the jumpers.
Table 12.
U Interface Functions
-
-
-
positive (+)
negative (-)
-
-
-
C613-03023-00 REV J