NDA-24305 CHAPTER 6
Page 281
Revision 1.0
IS-11572 (LAYER 3 SPECIFICATIONS FOR INTER-PBX SIGNALING PROTOCOL)
3. Service Conditions
1. The multi-rate bearer ser vice is available.
Multi-rate bearer service: Desirably multiplied valu e of 64 (64 kbps × “n”-desired number) is available for
the data transmission speed in addition to the current speed such as 384K (64K
× 6), 1536K (64K × 24) and 1920K (64K × 30).
The following service condit ions are concerned with the multi-rate bearer service.
(a) Routing data must be assigned per ph ys ical int er face (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 (UU S) can be sent via Q-SI G 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