Panasonic KX-TD1232 Program Manual page 236

General Programming
• For the KX-TD1232, port numbers 01 through 06 are for the Master System and 07 through
12 are for the Slave, if available.
• Refer to program [423] for the list of the ISDN port numbers and their corresponding jack
numbers.
Features Guide References
Integrated Services Digital Network (ISDN) — Basic Rate Interface (BRI)
236 Programming Guide