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Table C-2.
Network Interfaces Available on ARNs
Network
Interface
Description
Serial
Provides WAN connectivity. ARN models can have up to five serial ports (three on an
expansion module and up to two adapter modules).
Each port can operate independently with RS-232, RS-422, RS-449, RS-530, V.28,
V.35, and X.21 cables. Serial capability allows internal or external clocking.
ISDN BRI
Supports an S/T or U interface. The BRI provides two B channels, and supports full
D-channel signaling and call setup/tear-down as defined in 1988 CCITT (now ITU-T)
Q.921 and Q.931. For more information on ISDN, functional groups, or reference
points, refer to Configuring Dial Services .
The ISDN BRI option is available as an adapter module for any ARN model.
56/64K DSU/CSU Supports a 56/64K DSU/CSU interface.
FT1/T1 and
Provides an interface to convert incoming packet data from an external T1 or E1 line
FE1/E1 DSU/CSU
(using an RJ-48C connector). Because the interface integrates the Channel Service
Unit (CSU) function on each T1 or E1 port, it allows direct connection to the network. A
T1 port can transmit or receive a total of 24 DSO HDLC channels for each DS1 frame.
X.25 PAD
Provides an X.25 PAD interface.
V.34 Modem
Provides a V.34 modem interface.
Note: For the proper cables or cable pinouts to use for each interface type, see
the Cable Guide.
114200-E Rev 00
ARN Technical Specifications
(continued)
C-5
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