CHAPTER5 Cabling the Device
Mediant 800 Gateway & E-SBC | Hardware Installation Manual
● To avoid electric shock and/or damage to ports due to over-voltage phenomena,
you must connect the device to a reliable ground using the grounding termination
located on the device's rear panel.
● When the device is powered only from the 12V DC supply (utilizing the external
power adaptor), the device is not grounded!
● Ground the device prior to connecting the telephony port interfaces (FXO, FXS,
E1/T1 and BRI).
● When powering off the device, prior to disconnecting the ground cable at the rear
panel ((if required), remove all telephony interface cables.
➢ To ground the device:
1. Connect an electrically earthed strap of 16 AWG wire (minimum) to the chassis' grounding
screw (located on the rear panel), using the supplied washer and fasten the wire securely using
a 6-32 UNC screw.
Figure 5-1: Grounding the Device
2. Connect the other end of the strap to a protective earthing. This should be in accordance with
the regulations enforced in the country of installation.
Connecting to LAN
The device provides up to four 10/100/1000Base-T (Gigabit Ethernet) RJ-45 ports and up to eight
10/100Base-TX (Fast Ethernet) RJ-45 ports for connection to the LAN. These Ethernet ports can
operate in pairs (groups) to provide 1+1 port redundancy. In each pair, one port serves as the active
port while the other as standby. When the active port fails, the device switches to the standby port.
● The type and number of Ethernet ports depends on ordered hardware configuration.
● The Fast Ethernet ports are available only on "pure" SBC Mediant 800 (i.e., without
PSTN / Gateway interfaces).
By default, the Ethernet ports are grouped into pairs as shown in the following figure. You can
change this port assignment, including assigning only a single port to an Ethernet Group. For more
information, refer to the User's Manual.
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