User's Manual

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4.3 Two BTS Working Principle
IRCU-Cx14(x=4 or 8) serial has two pairs of AISG ports, is able to support 2 BTS control the
common antenna. IRCU-Cx14 it has two buses but share one configuration file and uniqueID.
IRCU-C414 is integrated 4 motors inside, IRCU-C814 is 8 motors.
The two pairs of AISG ports has no difference on function but priority, any band can be assigned
by AISG port no matter AISG1 or2, if the band is not configured by the another AISG port.
If IRCU-C814 doesn’t be configured yet, 2BTS both can get 8 bands information through scanning,
shown in table 2
Table 2 IRCU Device Information
If a band is configured by a AISG port, then the another AISG ports can’t see and control the
band. Only the first AISG port agree and hand over the control right, then the other AISG port
can see it through scan.
For instance, A BTS connects to IRCU-C814 AISG 1, B BTS connects to AISG 2, A BTS has already
configured band No 2, 3 and 5, B BTS only can see serial band No 1, 4, 5, 6, 7, and 8 information
through scanning, as shown in table 3.
Table 3 IRCU Device Information shown in B BTS
If B BTS configurate band No 1, 4 and 6, A BTS rescan IRCU only can see band No 2, 3,5, 7 and 8
after rescanning shown table 4.