Interworking is possible between:
1) A user who has subscribed to the multirate circuit-mode bearer capability and a user who has subscribed to the64 kbit/s unrestricted circuit-mode service when the information transfer rate is 64 kbit/s.
2) A user who has subscribed to the multirate circuit-mode bearer capability and a user who has subscribed to the384 kbit/s unrestricted circuit-mode service when the information transfer rate is 384 kbit/s.
3) A user who has subscribed to the multirate circuit-mode bearer capability and a user who has subscribed to the1536 kbit/s unrestricted circuit-mode service when the information transfer rate is 1536 kbit/s.
4) A user who has subscribed to the multirate circuit-mode bearer capability and a user who has subscribed to the1920 kbit/s unrestricted circuit-mode service when the information transfer rate is 1920 kbit/s.
When any other information transfer rate is specified, interworking is not possible between the multirate circuit-mode bearer capability and other services.