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NEAX2400 IPX ISDN Features and Specifications
Page 190
NDA-24311, Issue 1
Q-4 Q-SIG Circuit Switched Basic Call - ETSI Version
Q-4 Q-SIG Circuit Switched Basic Call - ETSI Version
General Description
This feature provides a tie-line connection between the NEAX2400 IPX and the other Q-SIG PBX using the ISDN
protocol in conformity with ETS 300 172 standardized by ETSI (European Telecommunications Standards
Institute).
Note 1: Layer 2 interface should be in conformity with Q.921.
Note 2: Connection to other vendor’s PBXs requires prior System Interworking Tests. Direct all inquires regarding which
PBXs the IPX System can be connected to or on arranging for testing with a particular vendor’s PBX to NEC America,
Inc. Corporation Networks Group Product Management department.
Operating Procedure
No manual operation is required.
Service Conditions
1. Layer 2 and less should be activated normally.
2. Redundancy structure
a.) One D channel can control maximum 60 B-channels.
b.) Control using the nB + D interface is available.
3. Split call (LCRC) from an Attendant console, data terminal or I terminal is not supported.
4. The Multi-rate bearer service is available.
Multi-rate bearer service: Desirably multiplied value of 64 (64 kbps x n -desired number) is
available for the data transmission speed in addition to the current
speed such as 384K (64K x 6), 1536K (64K x 24) and 1920K (64K x 30).
Following are the service conditions concerned with the multi-rate bearer service.
a.) Routing data must be assigned per physical interface (PRT/DTI).
b.) Overlap sending (LCRS) is not provided with this feature.
c.) Multi-rate bearer service is provided for the PBXs connecting directly with the Q-SIG interface.
(If the PBXs are connected with the different interface such as the interface defined by Q.931/
Q.931-a or CCIS, only H0/H1 service (transfer rate is 384 kbps/1.5 Mbps) is available.)
5. The User-to-User Signaling (UUS) can be sent via Q-SIG interface.
Following are the conditions for the UUS transmission.
a.) The maximum data capacity for the UUS is 128 bytes and the latter part of excessive data is
automatically omitted.
ISDN
Another
Office
CCIS
NEAX2400 IPX
PBX
Q-SIG Q-SIG
PBX
Another
Office