Motorola MTP850 Ex Product Information Manual page 72

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9.8 IP Addressing
9.8.1 Wide IP Address
An IP address may be assigned to the terminal by the SwMI during the PDP context activation.
When assigned, this address is used by both TE2 (and MT2) applications as the source address in
IP packets to be delivered to the infrastructure, and received as a destination address of the IP
datagrams received from the infrastructure.
9.8.2 Local IP Address
By default both TE and MT have their own IP addresses: "10.0.0.100" and "10.0.0.101" respectively
as specified in [Ref 4] clause 4.10.2. These addresses are used by TE2 and MT2 for local datagram
transmissions between TE2 and MT2 only and are not passed to the SwMI.
9.9 Advanced Link
Advanced Link is used for PD transmission.
Advanced link flow control is supported by the terminal.
Advanced Link Roaming, were the Advanced link is not disconnected between cells, is supported
(assuming support in the SwMI).
9.10 IP Compression
The terminal does not support data compression. If an application attempts to negotiate data
compression during context activation it will be rejected. If a data compressed IP packet is received
from the SwMI, it will be silently discarded.
The terminal does support IP header compression negotiation received from TE2 during PDP
context activation, and will transparently transfer IP packets with header compression between TE2
and the SwMI.
9.11 Terminal Roaming
The packet data service employs the TETRA standard cell selection and re-selection, in other words
"undeclared" both when the terminal is not involved in packet data transfers and when the terminal
is on the PDCH. The packet data service is suspended (in 'break' state) while the reselection is
occurring, and resumes when the cell reselection procedure is complete.
Note: The cell re-selection is "undeclared" in a strict TETRA sense. However, the SNDCP protocol
defines a procedure for reconnecting the packet data service on the new cell. In this sense,
the cell re-selection procedure resembles the "unannounced" cell re-selection procedure.
9.12 PD User Authentication
PD User authentication is a method of authenticating the TE2 user before allowing activation of the
packet data link. The actual authentication is preformed by an authentication center connected to
the SwMI. The terminal only relays the messages between the TE2 and the SwMI.
In 'wide mode', the terminal will offer PPP user authentication between MT2 and TE2 using PAP or
CHAP (as described in [Ref 21]) before the IP link is established. The terminal will always attempt to
negotiate usage of the CHAP method, but will agree to PAP if the TE2 application insists. If the
6866588D21-D Chapter 2 - MTP850 Ex/MTP810 Ex Product Information Manual
Services and Feature Description
March 2009