Chapter 7 eia-366 dialer operation, Configuration, Operation – Northern UTA220/UTA220k User Manual

Page 61: Chapter 7. eia-366 dialer operation

Advertising
background image

UTA220/UTA220k

7-1

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)

Advertising