The System Trunk Interface Extender module (STIX) module is a T1/E1 interface card that supports one T1/E1 port.  

T1/E1 Connector

T1/E1 Connector Pinouts

Pin Number


Pin 1

Receive Ring

Pin 2

Receive Tip

Pin 3

no connection

Pin 4

Transmit Ring

Pin 5

Transmit Tip

Pin 6

no connection

Pin 7

no connection

Pin 8

no connection