Specifications

FEATURES LBI-39000B
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4.1. MULTINODE JESSICA SYSTEM
An example of a multinode Jessica System is shown below.
Figure 8 - Multinode Jessica System
Outbound calls go through the local IMC only. For example as shown in Figure 8, an outbound call placed from a radio
on site 1 goes out Jessica A. An outbound call placed from a radio on site 4 goes out Jessica B. If Jessica B is down, an
outbound call from site 4 will not be routed to Jessica A. However, inbound calls can be routed to remote IMCs. In Figure 8
above, an inbound call through Jessica A will reach a radio on site 4.
Systems with multiple Jessicas require each Jessica to have unique channel numbers to correctly track calls to the same
LID/GID placed on different Jessicas. Therefore, the channel numbers which used to be in the range 1 to 30 will be mapped
to valid LIDs. LIDs in the range 1 to 511 are recommended for BCU/CAL compatibility. To support multiple Jessicas, a
unique LID is assigned per PI-IMC channel. The Line Definition screen of the System Manager (shown in Table 7) is used to
assign and upload unique PI-IMC channel LIDs. Valid LIDs are added into the Line Definition screen (line 1 in the Line
Definition screen corresponds to PI-IMC channel 1). Each PI must have unique PI-IMC channel LIDs.
Radio-enabled features are on a per PI basis. If the radio roams to territory covered by a different PI, then the radio user must
initiate desired features from that PI as well.
PSTN
StarGate
IMC A
IMC B
EDACS
Site 1
EDACS
Site 2
Dispatch
EDACS
Site 3
EDACS
Site 4
PSTN
JESSICA A
JESSICA B
Dispatch
NOTE