Figure 1: Connecting The Ht503; Table 1: Definitions Of The Ht503 Connectors - Grandstream Networks HT503 FXO User Manual

HT503
Front View
The HT503 has one FXS port and one FXO port. The PHONE port next to the power supply is an FXS
port. The LINE port on the back right of the HT503 is an FXO port. Both the FXS port and the FXO port
can have a separate SIP account. This is a key feature of HT503 as it supports simultaneous calls on
both the FXS port and FXO port. Telephone calls can be originated from or terminated on the PSTN
network remotely via the FXO port.
12VDC, 0.5A
LAN Port (RJ-45)
WAN Port (RJ-45)
PHONE (RJ-11)
LINE (RJ-11)
FIRMWARE VERSION 1.0.12.4
Display LEDs
(Green)

FIGURE 1: CONNECTING THE HT503

TABLE 1: DEFINITIONS OF THE HT503 CONNECTORS

Power adapter connection
Connect the LAN port with an Ethernet cable to your PC.
Connect the WAN port to the internal LAN network or router.
FXS port to be connected to analog phones / fax machines.
FXO port should be connected to the PSTN line
HT503 USER MANUAL
HT503
Back View
RJ-45 Ports
Power
Reset
10/100 Mbps
Supply
(12V)
RJ11 RJ11
FXS Port FXO Port
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