a) Type II information (common):
- information transfer capability =unrestricted digital information;
- information transfer mode = circuit;
- information transfer rate = 64kbit/s.
b) Type III information for interworking with PSPDN (packet applications) - Figure I.4:
- no type III information is required.
c) Type III information for interworking with PSTN:
i) voice applications - Figure I.5:
- no type III information is required;
ii) rate-adapted data applications -Figure I.6:
- no type III information is required.
d) Type III information for interworking with PSTN with end-to-end digital connectivity (data applications) - Figure I.7:
- user information layer 1 protocol =rate adaption + user rate (see Note).
Note - The profile described in Recommendation I.463 [52] is allowed.
Figure I.1/Q.931 – BC = 3.1 kHz audio – Voice –> CSPDN
Figure I.2/Q.931 – BC = 3.1 kHz audio – Voice –> PSTN
Figure I.3/Q.931 – BC = 3.1 kHz audio – Voice –> PSTN
Figure I.4/Q.931 – BC = 64 kbit/s UDI – Packet application –> PSPDN
Figure I.5/Q.931 – BC = 64 kbit/s UDI – Voice –> PSTN
Figure I.6/Q.931 – BC = 64 kbit/s UDI – Rate adapter data –> PSTN
Figure I.7/Q.931 – BC = 64 kbit/s UDI – Existing digital network
