Reference Guide for the Model XM128 ISDN Digital Modem
Call Control for 1TR6 (Old German ISDN)
In order to initiate a 1TR6 ISDN call, two information elements are necessary:
•Service indicator, which determines what kind of bearer services are desired.
•Destination address, which provides necessary information for the telephone company central office to direct the call to the remote party.
Control of Outgoing Service Indicator
The outgoing service indicator is assigned when you configure the B channel protocols using the command ATBnn.
Because there are a number of combinations of voice or
The following information is recommended to configure S104/S107 (service indicator) and S108/
S111 (additional information octet) according to the terminal types:
•Service indicator
•S107: analog, PHONE 1
•S104: analog, PHONE 2 Addi. S. I.
•S111: analog, PHONE 1
•S108: analog, PHONE 2
•Telephone1 (Fernsprechen)1 (3.1 KHz)
•Modem2 (analog - dienste)3 (Daten Über Modem)
•4 (Btx Über Modem)
•G3 Fax3 (analog - dienste)2 (Fax Gruppe 3)
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