Paradyne 3350 User Manual page 86

ACCULINK 3350 E1 NTU
COM Port Interface
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-2 and
the COM port-to-terminal/printer cable is shown in
Figure D-3.
DCE Transmit Clock
DCE Receive Data
Signal Ground
DCE Transmit Data
DCE Data Terminal Ready
DCE Carrier Detect
DCE Request-to-Send
DCE Receive Clock
D-4
Table D-4
COM Port Connector
Signal Direction
From NTU
From NTU
—
To NTU
To NTU
From NTU
To NTU
From NTU
June 1996
NOTE
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.
Pin Number
1
2
3
4
5
6
7
8
3350-A2-GB20-10