Northern UTA220/UTA220k - Manual (Page 61)

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)