GE MDS SD Series, Справочное руководство

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68 SD Series Ref. Manual (Packet & Transparent Mode) MDS 05-4846A01, Rev. C
Figure 53. IP Payload Configuration Menu
(Three such menus are provided for Payload 1, 2, and 3)
Understanding
Virtual Radio
Channels (VRC) for
IP and Serial Data
Instructions for common menu tasks are provided below. The use of
Virtual Radio Channels (VRCs) may require additional explanation
for new users. VRCs allow over-the-air data to be directed to specific
interface ports (IP or Serial). Conceptually, this can be pictured as cre-
ating “pipes” for delivery of data to the desired radio interfaces.
VRC works by associating data from a specific port (IP and Serial) with
a VRC channel number (1, 2, or 3). Each port at the receiving end then
filters incoming data based on the associated VRC number.
NOTE:
The Virtual Radio Channel (VRC) feature only works on
radios configured to operate in Packet Mode.
To create the “pipes” that direct data to the desired ports, a route must
be established using the IP Payload Configuration Menu (or the
COM1/COM2 Settings Menu for serial data). The default menu setting
is to listen to
all channels.) The
Talk on
parameter is used to specify the
VRC used for sending the data stream out, while the
Listen to
parameter
specifies the VRC(s) for incoming data. Use of these parameters is
described below.