General Information Guide - Release 3.1
ISDN Primary Rate Interface
ISDN Primary Rate Interface (PRI) has become the most
All inbound and outbound services that are usually obtained by using different trunk types (such as INWATS, OUTWATS, FX, Tie, and DID) can be accessed with a single ISDN trunk; as a result, the number of trunks can be reduced by 10 to 15 percent. On outbound calls, the system requests the required service from the Network. The trunk takes on the requested characteristics for the duration of the call.
At the same time, ISDN supports enhanced voice communications capabilities. These capabilities include Caller Line Identification Delivery (CLID), Automatic Number Identification (ANI), and Dialed Number Identification Service (DNIS). These options allow you to know who is calling and facilitate call center and CTI applications, fast call
R2
R2 Support
The 3300 R2 NSU provides access to the R2 National Public Switched Telephone Network (PSTN) with
Many countries use R2 signaling but do not adhere to the CCITT recommendations in their entirety. The 3300 ICP is completely flexible and supports regional variations of the R2 protocol. Line signaling, tone interpretation, and timing parameters for the converter can be adapted to suit any national or regional requirement. For example
•Line signaling features allow you to program up to four bits to define the incoming and outgoing patterns for line signals such as Idle and Answer
•Register signaling features allow you to program the type of address signaling termination (signaled or timed) and whether signaling should be
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