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Table2-1 FXO Port Connector Pin Assignment
RJ45 Connector Pin Number
1
2
3
4
5
6
7
8
Description NC
NC
NC
TIP
RING
NC
NC
NC
RJ45 Wiring Scheme (8 pin)
4
5
RJ11 Wiring Scheme (4 pin)
2
3
The FXO port on the GT48 can be used for PSTN interconnection as a redundant path besides IP for voice calls.
Both RJ45 connector and RJ11 connector can be used for FXO port. When the RJ25 connector is used, pin 4
and pin 5 carry out the analog signal pair. When the RJ 11 connector is used, pin 2 and pin 3 carry out the analog
signal pair.
2.1.2 Ethernet
Port
There are three 10/100M Ethernet ports on the GT48 main console module with RJ45 connector type and status
LED. Table 2-2 shows the pin assignment of those Ethernet connectors and LED status definitions.
Table2-2 Ethernet Port Pin Assignment and Status LED Definitions
Pin LED
1 2 3 6
Yellow
Green
TX+ TX- RX+ RX-
Connected
Live
¾
Ethernet Port (0)
：
reserved for future use.
¾
Ethernet Port (1)
：
for console/management/maintenance use.
¾
Ethernet Port (2)
：
VoIP broadband network interface. This port is used for all the VoIP activities that
include SIP and MGCP signaling protocol and RTP packets transmission. This port can also be used
for control/management/maintenance.
Note
：
If possible, we suggest customers use the Ethernet port 1 for software upgrade, device configuration, and
management operations and use the Ethernet port 2 for VoIP protocol and data transmissions.
2.1.3 Console
Port
GT48 supports configuration through a console port (CON) of RJ45 connector type. Table2-3 shows the
connector interface scheme of RJ45 to DB9 and DB25.