Black Box LR1530A-EU-R3 - Manual (Page 86)

Servicing Information
80
UNIVERSAL WAN Module:
The Universal WAN Interface module in this router may be configured
to operate in one of four modes: V.11/X.21, V.35, RS232/V.24, or
RS530/RS422. The interface connector for all types is a standard DB25
pin female connector.
13
1
25
14
WARNING: ensure that the connector cable used with the Universal
WAN interface module has the correct pinouts for the operational
mode selected for the interface (V.11X.21, V.35, RS232/V.24, or
RS530/RS422). Using the incorrect cable connector for the operational
mode selected may cause permanent damage to the interface module.
Pinouts for each mode of operation are listed on the pages following.