7.1 Troubleshooting
7.1.1 Installation
PROBLEM PROBABLE CAUSE SOLUTION
You cannot make/receive
calls via an IP network.
• DSP card malfunction • Replace the corresponding card.
• Mother board
malfunction
• Replace
the mother board (be sure to turn
off the PBX when replacing).
• Not enough activation
keys
• Purchase
additional activation key codes.
Please consult a certified dealer for
details.
• Poor connection • Make
sure that an 8-pin twisted pair cable
is used for connection.
• Make sure that none of the CAT 5/CAT 5e
cables in use are over 100 m (328 ft) in
length.
• Make sure that a straight cable is used for
connection to a switching hub.
• Network malfunction • Make
sure that all network devices in use
are switched on.
• Make sure that there is no unwanted
firewall in the IP network.
IP-PTs/SIP phones do not
operate.
• DSP card malfunction • Replace the corresponding card.
• Mother board
malfunction
• Replace
the mother board (be sure to turn
off the PBX when replacing).
• Not enough activation
keys
• Purchase
additional activation key codes.
Please consult a certified dealer for
details.
• IP-PT/SIP phone not
registered
• Register the corresponding IP
-PT/SIP
phone.
• IP-PT/SIP phone
malfunction
• Replace the IP-PT/SIP phone.
• Poor connection • Make
sure that an 8-pin twisted pair cable
is used for connection.
• Make sure that none of the CAT 5/CAT 5e
cables in use are over 100 m (328 ft) in
length.
• Make sure that a straight cable is used for
connection to a switching hub.
• Network malfunction • Make
sure that all network devices in use
are switched on.
• Make sure that the IP-PT/SIP phone is not
blocked by the firewall or other network
devices.
258 Installation Manual Document Version 2016-03
7.1.1 Installation