User guide

2-16 Solo E1 DSU User Guide—June 1998
2
3. Connect the remote terminal:
a. Plug the phone line to the modem.
b. Connect the modem to the remote terminal.
To conÞgure a remote Solo E1 DSU, refer to ÒRemote Solo E1 DSU-Modem
ConnectionÓ on page 3-25.
Connecting Multiple Standalone Solo E1 DSUs
You can connect Digital Link Solo E1 DSUs in a daisy-chain conÞguration
using a multidrop cable. With this conÞguration, you can connect multiple
Solo E1 DSUs to a single terminal, modem, or SNMP workstation. Use a
ribbon cable (available from Digital Link) with DE-9 connectors. For part
numbers, refer to Table 2-8 on page 2-14.
DE-9 Connector, Pin 8
Digital Link products implement a proprietary collision avoidance
algorithm that uses the CTS signal on Pin 8 of the DE-9 connector.
To daisy-chain Solo E1 DSUs, use a ribbon cable with DE-9 connectors:
4. Connect the socket DE-9 connector to the terminal or modem
(if at a remote site).
5. Connect the male DE-9 connector to the COMM port on each
Solo E1 DSU.
Figure 2-6 shows three Solo E1 DSUs connected to a terminal in a daisy-
chain conÞguration.
NOTE: Make sure CTS (pin 8) on the socket DE-9 connector is not
connected to Pin 8 on the male connector. CTS pin 8 must be
connected between Solo E1 DSUs, but must not be connected to the
terminal.
If your cable is not from Digital Link, verify that pin 8 is not connected.