Allied Telesis OmniConnect ISDN - Manual (Page 29)

OmniConnect / ISDN User’s Manual Page 23
Part number 613-10787-00
3.7. Cabling specifications
This section describes the cabling specifications for all the connectors on the rear panel of the
OmniConnect/ISDN access device. Tables describing the pin-outs for the ISDN U, S/T,
Console (DB-9) and POTS line are included in this section.
Table 3-1 ISDN BRI U Interface Pin-out for RJ-45
Pin(s) Function
1, 2, 3, 6, 7, 8 Not Used
4 U Interface Tip Connection
5 U Interface Ring Connection
Table 3-2 ISDN BRI S/T Interface Pin-out for RJ-45
Pin(s) Function
1, 2, 7, 8 Not Used
3 S/T Transmit Positive
4 S/T Receive Positive
5 S/T Receive Negative
6 S/T Transmit Negative
ISDN BRI is provided by the Telephone Company from a central office switch to the
customer premises. The ISDN cables can be silver satin cables, though it is recommended that
Category 3 or Category 5 cables are used. The ISDN U and S/T interfaces utilize an 8 pin RJ-
45 jack. They should be connected to the telephone company line or an external NT1 with a
straight through (untwisted) RJ-45 cable.
Table 3-3 Console Port Pin-out (DB-9 Female)
Pin(s) Function
1 DCD – Data Carrier Detect Output
2 RXD – Receive Data Output
3 TXD – Transmit Data Input
4 DTR – Data Terminal Ready Input
5 Signal Ground
6 DSR – Data Set Ready Output
7 RTS – Request to Send Input
8 CTS – Clear to Send Output
9 Not Used
The OmniConnect/ISDN access device only uses pins 2, 3 and 5. The rest of the pins are
unused. All input and output references are with respect to the OmniConnect access device.