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1.4
Interfaces
Connection to a the local area network
Fall the LAN connection to the local area network, the M875 has a switch with the two ports
"X2P1" and "X2P2". The two ports can be configured with different IP addresses.
Connect your local area network via port X2P1 or X2P2.
Note
No use of the M875 as a router between internal subnets
Do not use the M875 as a router between internal subnets.
Connection to the remote network
For the wireless connection to the remote network, the M875 has two SMA sockets. If you
only connect a single antenna, use the upper SMA socket "A1" of the M875.
1.5
LEDs to display operation
The LEDs on the M875 provide information about the operating status of the device.
Meaning of the LEDs on the left-hand side of the device
LED
S
(Status)
Q
(Quality)
C (Connect)
S, Q, C
simultaneousl
y
SCALANCE M875
Operating Instructions, 12/2012, C79000-G8976-C258-02
Status
Flashing slowly
Flashing quickly
On
Off
Flashing briefly
Flashing slowly
On, with brief interruptions
On
Off
Flashing slowly
On
Flash on and off in sequence
(fast)
Flash on and off in sequence
(slow)
Flashing fast (in sync)
Description of the device
Meaning
PIN transfer
PIN error/ SIM error
PIN transfer successful
Not logged into GSM network
Poor signal strength (CSQ < 6)
Medium signal strength (CSQ= 6 to 10)
Good signal strength (CSQ 11 to 18)
Very good signal strength (CSQ > 18)
No connection
EGPRS/GPRS connection active
HSPA/UMTS connection active
Device startup
Transfer of new firmware
Error
1.4 Interfaces
15
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