Panasonic KX-TDA50 Pc Programming Manual page 678

7.6 [5-4] External Relay
Value Range
1–64
Maintenance Console Location
7.6 [5-4] External Relay
Programming Manual References
4.11 [2-7-1] Class of Service—COS Settings—Optional Device & Other Extensions—
Feature Manual References
9.1.14 Internal Call Block
5.1.8 External Relay
678 PC Programming Manual
External Relay Access
Document Version 2010-11