Specifications

Hardware Reference 33
C613-03058-00 REV A
For a complete description of the analogue voice port features and the
commands available to configure the PABX services, see the Software
Reference for your router.
LAN Ports
All models in the AR300 Series, except the AT-AR330, have a single Ethernet
10BASE-T LAN port. The AT-AR330 has two Ethernet 10BASE-T LAN ports. A
rear panel slide switch (labelled MDX) allows the user to configure the LAN
port(s) for direct connection to either a hub or a personal computer. The same
RJ-45 cable (supplied with the router) may be used in either situation.
LAN ports operate in half duplex mode and can easily be tested using a simple
external loopback plug. See “Loopback Plugs for Testing Interfaces” on page 90 for
details of how to construct a loopback plug.
Asynchronous Ports
Asynchronous ports are wired as standard DB9 connectors, and can be
connected to most PCs using a standard DB9-to-DB9 cable. An approved DB9-
to-DB9 cable and DB9-to-DB25 adapter are shipped with each AR300 Series
router. The connector type and maximum speed varies from model to model
(Table 15 on page 33). All standard modem control lines are provided. By
default, the asynchronous ports operate at 9600 bps, 8 data bits, 1 stop bit, no
parity, and hardware flow control.
G.703/PRI ISDN Ports
The G.703/PRI ISDN port provides unchannelised 2048 kbps G.703 (model
AT-AR390) or 2048 kbps Primary Rate ISDN with 30 B channels + 1 D channel
(model AT-AR395). Unbalanced 75Ω coax is supported via a pair of BNC
coaxial connectors. Balanced 120Ω twisted pair is also supported via an RJ-45
8-way connector. A push button switch on the rear panel is used to select the
required interface type for the port, and an LED on the rear panel indicates the
current selection.
The G.703/PRI ISDN port does not support “Telco supplied power” through
the twisted pair interface.
Table 15: Asynchronous ports, connector types, and maximum speeds on AR300
Series routers.
AR300 Series
Model
Asynchronous
Ports Connector Type Maximum Speed
AT-AR300L(S) 1 DB9 female 19.2Kbps
AT-AR300(S) 1 DB9 female 19.2Kbps
AT-AR310(S) 1 DB9 female 19.2Kbps
AT-AR320 2 DB9 male 115.2Kbps
AT-AR330 2 DB9 male 115.2Kbps
AT-AR350 2 DB9 male 115.2Kbps
AT-AR370(S) 2 DB9 male 115.2Kbps
AT-AR370(U) 2 DB9 male 115.2Kbps
AT-AR390 2 DB9 male 115.2Kbps
AT-AR395 2 DB9 male 115.2Kbps