NEC Electra Elite IPK Programing Manual page 683

Document Revison 1
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S 3 ISDN-PRI C
ECTION
3.1
3.2
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3 - 30
C
ALL BY ALL
General
Call by Call Service allows multiple services to share a PRI line.
When a call is originated or terminated, an Information Element (IE) called the
Network Specified Facility (NSF) is added to the SETUP message to identify
the service associated with the call.
The number of Simulated Facility Groups (SFGs) that can be simultaneously
used for each service must be restricted. The total number of SFGs must be
less than the number of PRI channels. The SFGs are determined when
contracting with the network. The network determines whether calls that
exceed the restriction are rejected or diverted. For outgoing calls, the KTS
counts the number of calls in progress per group, and rejects excess calls.
For Call by Call to operate, the number of B channels used for PRI must be
specified using Memory Block 1-13-00 (PRT Channel Assignment), and Call
by Call service must be assigned to each PRT using Memory Block 1-13-03
(Call by Call Service Selection).
Memory Blocks
The following related Memory Blocks are used when assigning Call by Call.
Title
DID Digit Length Selection .................................................... 1-1-20
DID Digit Conversion Assignment ......................................... 1-1-21
DID Digit Conversion Table ................................................... 1-1-22
DID Forward Station Number for Busy Station
or Undefined Digit.................................................................. 1-1-23
Access Code (1~3 Digit) Assignment .............................. 1-1-46~48
Route Advance Block Assignment ........................................ 1-1-30
ISDN DTMF Duration/Interdigit Selection.............................. 1-1-80
ISDN Dial Interval Time Selection ......................................... 1-1-81
SLT or Automated Attendant/DISA to CPU PBR Selection ... 1-8-01
PBR Receive Level Assignment for
Automated Attendant/DISA ................................................... 1-8-02
Elite IPK
Memory
Block
Advanced Applications