User Manual

System Description RF-Orchestra!™ Transmitter Installation and Operation
2-6 6880493G02-C July 2000
The system provides the following two ways for the message sender to review the response:
• Call Query—The message sender can call back to the system at a later time and use the
transaction ID to retrieve the response.
• Auto MESSAGE—If the message sender is also a subscriber in the system, the system can
be instructed to send the response directly to the message sender’s pager.
InFLEXion Messaging Protocol Features
The InFLEXion messaging protocol system provides for local frequency reuse based on
subchannel frequencies in the 50 kHz channel bandwidth. Up to seven subchannels are
available in a 50 kHz bandwidth for the InFLEXion messaging protocol, and the system is
configured with a cellular-like design. Individual transmitter sites can be active and
broadcasting on a given subchannel, while an adjacent transmitter is active and broadcasting
on a different subchannel. Properly spaced transmitters can be operating on the same
frequency, transmitting different messages at the same time.
In addition to registration and acknowledgment, InFLEXion voice messaging has support for
virtual storage. Although the pager can store several minutes of voice messages, when the
memory becomes full, the pager instructs the system to hold messages in the terminal. The
terminal acts as a buffer until space becomes available in the pager. When pager memory
becomes available, the queued messages are forwarded to the pager.
The InFLEXion voice technology has other benefits:
• The actual voice of the caller conveys the message urgency. Voice messaging provides a
level of communication different from numeric or alphanumeric messaging.
• In many cases, a voice message does not require a return call because more detail can be
conveyed in a voice message.
• Language independence is achieved because the message flows from the caller to the
subscriber, thus negating the need for translation.