Northern UTA220/UTA220k manual Chapter EIA-366 Dialer Operation, Configuration, Pin Function

EIA-366 Dialer Operation

Chapter 7

EIA-366 Dialer Operation

The UTA220 implements the EIA-366 dialer in accordance with the EIA Standard RS-366 specification.

CONFIGURATION

The upper two ports of the UTA220 are configured as EIA-366 dialer ports. In this configuration, the lower two ports function as the data ports for the dialer ports. The EIA-366 dialer ports are dedicated to the data ports as follows:

•Dialer port 3 is dedicated to data port 1

•Dialer port 4 is dedicated to data port 2

OPERATION

Calls are initiated through the parallel dialer port interface (the upper two ports).

The DTE connects to the dialer port by the DB-25 connector.

Connector functions are shown in Table 7-1.

Note: If an EIA-366A device is to be connected to a port, refer to EIA-366A Requirements section in Appendix D.

	Table 7-1: Dial Connector Functions
Pin		Function
1		Frame Ground
2		Digit Present (DPR)
3		Abandon Call and Retry (ACR)
4		Call Request (CRQ)
5		Present Next Digit (PND)
6		Power Indication (PWI)
7		Signal Ground
13		Distant Station Connected (DSC)
14		Digit Lead 1 (NB1)
15		Digit Lead 2 (NB2)
16		Digit Lead 3 (NB4)
17		Digit Lead 4 (NB8)
22		Data Line Occupied (DLO)

UTA220/UTA220k 7-1