Operating instructions

TransTel Model TD-824-I Digital Telephone System - General Description - Installation - Programming Forms Manual
Page 134 Version 1.3b October 2005
Includes all versions through G1-a20x
Form 70-Cd - ISDN Interface Specifications Program:
IDSN=01 ISDN=02 ISDN=03
Cd=01 (Default=1)
Cd=02 (Default=0)
Cd=03 (Default=1)
Cd=04 (Default=0)
General:
Assigns the ISDN interface to either “S” interface or “T” interface.
Description:
Cd= 01 is to assign the “S” or “T” interface for the ISDN port on G1-SIU card.
0= “S” interface. It can connect two ISDN devices. Use Program 43-CN to set the Device
Station Number (Station Type is 9).
1= “T” interface. It can be connected to “NT” interface of ISDN line.
Cd= 02 is for the test purpose. Only for approval
0= Loopback disabled
1= Loopback enabled
Cd= 03 is for connection method
0= Point to Point
(recommend ‘0’ for internal ISDN S interface use if only one ISDN device connected)
1= Point to Multi-point
2= Point to Multi-point and ignore the unknown MSN or DDI number (not assigned in mode 72)
This application is normally for other ISDN devices (e.g. ISDN TA, ISDN video conference, ISDN card, …) that are
hooked on NT1 with TD-824I together.
Cd= 04 is for ISDN PLL (Phase Loop Lock)
0= Auto detect
1= Lock this ISDN line for PLL. Signal.