NETGEAR XM128 ISDN - Manual (Page 69)

Advanced ISDN 7-1
Chapter 7
Advanced ISDN
This chapter provides information about using advanced ISDN for the Model XM128 ISDN
Digital Modem.
Call Control for DSS1
In order to initiate a Digital Subscriber Signaling #1 (DSS1) ISDN call, two information elements
are necessary:
• The bearer capability element indicates what kind of bearer service is desired. It is also used
for compatibility checking in the addressed entity.
• The called party number element provides necessary information for the telephone company
central office (CO) to direct the call to the destination.
The following optional information elements are also pertinent to call control:
• High-layer compatibility
• Low-layer compatibility
• Calling party number
• Called party number
• Calling party subaddress
• Called party subaddress