NEC NEAX 2400 IPX Programming Manual page 299

3. Service Conditions
1. The multi-rate bearer service is available.
Multi-rate bearer service: Desirably multiplied value of 64 (64 kbps × "n"-desired number) is available for
The following service conditions are 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.)
2. The User-to-User Signaling (UUS) can be sent via Q-SIG interface.
The following conditions are 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.
(b) The following messages for call establishment/clearing may include the UUS.
• Setup
• Alerting
• Connect
• Progress
• Disconnect
• Release
• Release Complete
IS-11572 (LAYER 3 SPECIFICATIONS FOR INTER-PBX SIGNALING PROTOCOL)
the data transmission speed in addition to the current speed such as 384K (64K
× 6), 1536K (64K × 24) and 1920K (64K × 30).
NDA-24305 CHAPTER 6
Page 281
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