GAI-Tronics 69320-001 Voice Network Adapter (VNA) - Manual (Page 3)

Pub. 42004-681L2A
Model 69320-001 Voice Network Adapter Page: 3 of 14
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06/04
Connections to the Field Wiring Terminal Blocks
69320-001 Voice Network Adapter Connections to the Field Wiring
Connections to the field are made via the upper DB25 connector on the rear of the 10457 Series Card Rack
assembly. This connector may be utilized by a direct connection of a DB25 cable to the field equipment, a
DB25 cable to a DIN rail-mounted terminal block adapter, or with the use of a DB25-to-RJ45 connector
adapter. The pinout definition for the DB25 connection is shown is the table below.
Upper DB25 Connector
Pin Signal
1 Tx (ring)
2 Tx (tip)
5 Rx (ring)
6 Rx (tip)
Included with the VNA are two DB25-to-RJ45 connector adapters. The 21246-014 Connector Adapter
brings the transmit pair to the RJ45 pins 1 & 2 and the receive pair to pins 4 & 5. The 21246-008
Connector Adapter brings the transmit pair to the RJ45 pins 4 & 5 and the receive pair to pins 1 & 2. These
adapters permit the use of non-crossover Ethernet cables for the connections to field equipment utilizing
these same pins on an RJ45 connector.
Cabling to the field equipment should be a twisted pair design.