Paradyne 336x E1 COM Port Interface, Table D-4 COM Port Connector Signal Direction Pin Number

ACCULINK 336x E1 NTU

COM Port Interface

NOTE

The COM port connects to a PC for front panel emulation, to an ASCII terminal or printer for alarms, to a network device (e.g., a router) for SNMP applications, to the SNMP LAN Adapter for SNMP applications, or to another E1 NTU's AUX port for daisy chain connectivity.

(The SNMP LAN Adapter includes the cable that is needed to attach it to the E1 NTU.) The COM port connector is an 8-position keyed modular connector (Table D-4). The data signals on this port are referenced to a DTE interface.

The COM port-to-PC cable is shown in Figure D-2and the COM port-to-terminal/printer cable is shown in Figure D-3.

For daisy-chaining an AUX port to a COM port, a customer supplied, 8-pin-to-8-pin, straight- through cable is required and the appropriate configuration options (Com Use and Aux Use) must be set to Daisy. Whenever the cable is connected or disconnected, you should change the Daisy selection to ensure that the correct parameters have been negotiated for the link layer.

Table D-4

COM Port Connector

Signal

Direction

Pin Number

DCE Transmit Clock

From NTU

1

DCE Receive Data

From NTU

2

Signal Ground	Ð	3
DCE Transmit Data	To NTU	4
DCE Data Terminal Ready	To NTU	5
DCE Carrier Detect	From NTU	6
DCE Request-to-Send	To NTU	7
DCE Receive Clock	From NTU	8

D-4 December 1996 3360-A2-GB20-20