E F Johnson Company 2425720 Manual De Usuario
9-2
Viking™ VP600 Portable Radio Operating Manual
Data Features
9.1.2 Context Activation
For the radio to access data service on a trunking system, it must be a valid user on the
system and it must be affiliated to an RF site. Once this is accomplished, the radio must
request data services from the trunked system through the process of context activation; a
data registration of the radio with the system. Context activation is initiated from the radio.
In an EFJohnson radio, context activation is automatically initiated when the user selects a
P25 trunking system with either data registration enabled or OTAR enabled. During a
context activation, the radio attempts to access a packet data channel (PDCH) at the site
and send it its request for data services. If the context activation is successful, the radio
will receive a response containing a IP address. This IP address will be used by the radio
as a source IP address for all inbound data messages sent, and is used by the host
application as the destination IP address for all outbound data messages. If for some
reason the context activation fails, the radio will not be allowed to use data services on the
trunked system. If a PPP link is established between the portable computer and radio
without the radio context activated, any data transmitted by the computer to the radio is
ignored.
system and it must be affiliated to an RF site. Once this is accomplished, the radio must
request data services from the trunked system through the process of context activation; a
data registration of the radio with the system. Context activation is initiated from the radio.
In an EFJohnson radio, context activation is automatically initiated when the user selects a
P25 trunking system with either data registration enabled or OTAR enabled. During a
context activation, the radio attempts to access a packet data channel (PDCH) at the site
and send it its request for data services. If the context activation is successful, the radio
will receive a response containing a IP address. This IP address will be used by the radio
as a source IP address for all inbound data messages sent, and is used by the host
application as the destination IP address for all outbound data messages. If for some
reason the context activation fails, the radio will not be allowed to use data services on the
trunked system. If a PPP link is established between the portable computer and radio
without the radio context activated, any data transmitted by the computer to the radio is
ignored.