Allied Telesis OmniConnect ISDN - Manual (Page 73)

OmniConnect / ISDN User’s Manual Page 67
Part number 613-10787-00
ISDN CONNECTORS DO NOT SEEM TO MATCH
The OmniConnect/ISDN series access devices connect to the ISDN line with a
straight-through ISDN BRI cable. This cable is fitted with both RJ45 (eight
conductors) and RJ14 (six conductors) ends. Connect the RJ45 end of the cable
into OmniConnect access device, and the RJ14 end (the smaller one) into the
ISDN network interface jack. In lieu of an ISDN cable, a straight through
10Base-T cable with RJ45 jacks may be used. If the telephone company has
installed an RJ14 jack, RJ14/RJ11 telephone cable may be used. We do not
recommend the use of "Silver Satin" flat ribbon cable, as it is not designed for
high speed digital phone lines. Although the maximum distance from the
network interface jack to the access device is 1000 meters (3280 feet) for a U
interface, we recommend the cable be kept as short as possible.
A U interface connection uses a two wire physical interface on pins 4 & 5 of an
RJ45 jack. This maps to pins 2 & 3 of an RJ11 jack, or pins 3 & 4 of an RJ14
jack. The pin-outs are not relevant, just ensure that the center two pins for of the
connector are used.
An S interface connection uses a four wire physical interface on pins 3, 4, 5, and
6 of an RJ45 jack. This maps to pins 1, 2, 3, 4 of an RJ11 jack, or pins 2, 3, 4
and 5 of an RJ14 jack.
Note: For a U interface on an RJ45 interface, pin 4 is Tip (T), and pin 5 is Ring (R). For
an S/T interface, pin 3 is Tip (T), pin 4 is Tip 1 (T1), pin 5 is Ring (R), and pin 6 is
Ring 1 (R1).
ISDN LINK LEDS DO NOT LIGHT WHEN ATTEMPTING TO
CONNECT TO THE ISDN PROVIDER
Check that the ISDN line is correctly connected to OmniConnect access device.
If an OmniConnect/ISDN (ST) is being used, the connection to the ISDN line
must be through an external NT-1 device. If an OmniConnect/ISDN (U) access
device is being used, the connection to the ISDN line must be direct. See the
section on ISDN cabling for further details.
Check that the SPIDs and other ISDN related information, such as switch type
that have been entered during the configuration process using OmniStart are
correct and valid. The OmniConnect access devices support AT&T (NI-1, Point-
to-Point, Point-to-Multipoint), Northern Telecom DMS-100 (NI-1, Custom),
DSS1 and 1TR6 switches.
A simple test to check ISDN connectivity is to attach an analog phone line to the
OmniConnect access device jack labeled PHONE and then pick up the handset.
A dial tone should be heard. This is an indication that the ISDN line is
configured correctly.
Another simple test is to use the OmniConnect Monitor’s ISDN Loopback test
capability to test the ISDN connection. See the OmniConnect Monitor chapter
for details on running this test.
Check with the ISDN provider to verify that the ISDN line is operational. In
most instances, they will be able to conduct a remote loopback test to verify that
the line is operational.