Technical data

ARN Technical Specifications
114200-D Rev 00
C-9
Token Ring UTP Interface
The token ring UTP interface provides unshielded twisted-pair support. The ARN
token ring expansion module and token ring/tri-serial expansion modules contain
this receptacle.
Table C-6
shows the RJ-45 pin assignments for the UTP interface and identifies
the pin locations.
Serial Interfaces
The ARN supports up to five serial interfaces. You can connect up to three, 44-pin
(DB-44) serial cables to an ARN that contains an optional Ethernet/tri-serial,
token ring/tri-serial, or tri-serial expansion module. You can connect one, 44-pin
serial cable to each serial adapter module (the ARN can support two).
The serial interfaces provide multiprotocol WAN connection, each operating
independently with RS-232, RS-422, RS-530, V.35, V.28, and X.21 electrical
interfaces at transmission rates from 1200 b/s to 2.048 Mb/s. When used with
standard keyed cables, the ports automatically configure to the desired electrical
interface.
You can use the following cables, described in the Cable Guide:
• V.35 connections (Order No. 7220)
• V.28 connections (Order No. 7837)
• X.21 connection (Order No. 7224)
Table C-6. Token Ring UTP Interface Pin Assignments
Pin Assignment Pin No. Signal (Function)
1 Not used
2 Not used
3 TX+ (Transmit to UTP wire)
4 RX+ (Receive from UTP wire)
5 RX- (Receive from UTP wire)
6 TX- (Transmit to UTP wire)
7 Not used
8 Not used
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