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:: F A Q  
   
     
  IP Broadband Telephony
     
  A General Questions
  1. How to distinguish network quality?
  2. I am using Switch or HUB, which kind of Ethernet cable I need to connect to my phone?
  3. I use the LAN port of my phone to connect to the Internet and use the PC port of my
phone to connect to the PC, but the PC cannot get online
  4. Selection of GK Zone
  B Installation Question
  1. My phone shows "Wait Logon ......" Cannot logon normally
  2. I use Cable Modem to connect my phone, but the phone cannot acquire IP.
  3. .I connect my phone to the Ethernet port of Router, but my phone cannot
acquire IP.
  4. I use the Ethernet cable provided by my ISP to connect to my phone directly, but my
phone cannot acquire IP.
  5. I can login with my USB phone, but I cannot login with my RJ45 phone.
  C User Questions
  1. My phone shows "Ready For Call", but it cannot dial or receive call
  2. My phone can dial out, but not receive.
  3. Always hear busy tone when dial to a certain phone from my phone, but I can dial to other
phones.
  4. Call quality

 

  A General Questions
  1. How to distinguish network quality?
    In the window, click menu "Start" > "Run" > input "command" > click "Enter" to go to MSDOS.
In MSDOS window:
Input: ping XXXXXX(IP address r DNS)
The window will show:
Reply from XXXXXXXX: bytes=32 time=XXXms TTL=XXX
Reply from XXXXXXXX: bytes=32 time=XXXms TTL=XXX
Reply from XXXXXXXX: bytes=32 time=XXXms TTL=XXX
Request timed out.

Ping statistics for XXXXXXXXXX:

Packets: Sent = 4, Received = 3, Lost = 1 (25% loss)
Approximate round trip times in milli-seconds:

Minimum = 151ms, Maximum = 300ms, Average = 240ms

(i) Delay
The value of "Minimum =" means minimum delay. The value of "Maximum =" means maximum
delay. "Average =" means average delay. "ms" is time value(1/1000 sec). The minimum and
maximum time delay of package to the destination is 151ms and 300ms respectively. The average
delay is 240ms.
(ii) Jitter
Jitter can be identified by the comparison between Maximum/Minimum Delay and Average Delay.
The difference between them is the jitter level.
(iii) Package Loss Percentage
In "Lost = a (b% loss)", "a" means the quantity of package loss, "b" means the percentage of
package loss.

A. For the following:
(i) Public IP dials to regular phone
(ii) Caller and receiver both are in public IP
(iii) Caller and receiver both are in private IP
      You can check the network quality by ping XXXXXXX(IP address of the opposite) to get package
loss percentage.
B. For other circumstances
You can check the network quality by ping XXXXXXX(Server DNS) to get package loss
percentage.

   
 
  2. I am using Switch or HUB, which kind of Ethernet cable I need to connect to my phone?
    Select Straight-through Ethernet cable for Switch and HUB; select Cross-Over Ethernet cable for
other Ethernet devices. (Such as XDSL adapter, Cable Modem or PC, etc.)
   
  3. I use the LAN port of my phone to connect to the Internet and use the PC port of my
phone to connect to the PC, but the PC cannot get online
    Reason: The phone and the PC only have one IP, so they cannot use net at the same time. The
ports of RJ45 phone are similar to a 2Port HUB. It does not have the router function of NAT, so it
cannot serve as a router.
You just need to add Router or proxy server with NAT function in the front of your phone. Using
the LAN port of your phone to connect to the Router or proxy server and using PC port of your
phone to connect to the PC. In this situation, your phone and your IP can acquire different IP, thus
get online at the same time.
If the problem is not solved, contact your agent to check any problem of the network connecting
ports.
   
  4. Selection of GK Zone
    In some cases, you don't need to input `service address' manually but only to select a GK zone.
Please contact your service carrier or agent to check the selection of GKZone.
   
  B Installation Question
  1. My phone shows "Wait Logon ......" Cannot logon normally
    Circumstance 1: The phone shows "Wait logon......"all time.

Reason 1: Incorrect connection of network port or abnormal IP addresses distribution of
network devices.
Check Ethernet cable connects to the LAN port properly. Make sure there is no problem with the
Ethernet cable.
Reason 2: Default network setting does not match the network.
If your network using PPPoE (eg. ADSL user), please disable DHCP and enable PPPoE. Set
PPPID and PPPIN correctly. Save the setting and restart the phone. Refer to the user manual for
detailed setting instruction.
Reason 3: If using DHCP to acquire IP, but the network does not support DHCP(automatic
form) or distributed IP by network devices failed.
Go to Menu "TCP/IP" Settings and select Local IP. If the value of Local IP is 0.0.0.0, no IP has
acquired.
Please check whether your network support DHCP. If it does, set your phone IP as static IP
address manually. Refer to user manual for setting instruction. If you confirm the network does
support DHCP, it probably the problem of distributed IP by network devices failed. Refer to
Circumstance 2, 3, 4 for details.
Reason 4: Network restriction
Your ISP or network administrator may restrict the MAC addresses of network devices. It restricts
the connection of not permitted devices. Contact your ISP or network administrator for solution.
Reason 5: The network disconnection causes login failed.
Restart your phone to solve this problem.
Reason 6: Incorrect setting or no setting of the server of service carrier.

Go to Menu "Account Settings" and select "Service Address". Check whether the server of service
carrier is set correctly. If your "Account Settings" menu has no "Service Address", but has "GK
Zone", ignore Reason 6.
Reason 7: Firewall may exist in your network or you use network devices or software with
firewall function. The firewall chops the communication.
Please first inquire your agent to get server IP, then contact your ISP or network administrator to
cancel the following restrictions: the restriction that data sent from UDP2000 port of phone IP to
UDP1719 port of server IP; the restriction that data sent from UDP1719 port of server IP to
UDP2000 port of phone IP.

If all the above are no problems at all. Please contact your network administrator to check whether
the network is usable.

Circumstance 2: The phone screen shows "Security deny" at first and shows
"Wait Logon" after a few sec.
Reason: One or more incorrect settings in your phone settings User Name, Phone Number and
Password.
Check whether User Name, Phone Number and Password are corrected. Please input correct
information, save settings and restart the phone.

Circumstance 3: The phone screen shows "Account is using" at first and shows
"Wait Logon" after a few sec.
The account is using. It may cause by the sudden network disconnection during previous phone
restarting or phone in using. Wait for approximate 5 mins and login again.

Circumstance 4: The phone screen shows "Unknown failed" at first and shows
"Wait Logon" after a few sec.
Reason: Firewall may exist in your network or you use network devices or software that with
firewall functions. The firewall chops the communication.
Please first inquire your agent to get server IP, then contact your ISP or network administrator to
cancel the following restrictions: the restriction that data sent from UDP2000 port of phone IP to
UDP1719 port of server IP; the restriction that data sent from UDP1719 port of server IP to
UDP2000 port of phone IP.
Please report the above to the network administrator and require him to open the correspondent
ports and firewall.

If all the circumstances are confirm as no problems and your phone still cannot login, contact your
agent for technical support.

   
  2. I use Cable Modem to connect my phone, but the phone cannot acquire IP.
    Reason: Some Cable Modem would lock on the MAC addresses of network devices automatically.
Please connect your phone and Cable Modem with Ethernet Cable. First cut the power of the
Cable Modem and then restart the modem. At last, restart the phone.
If the problem is not solved, contact your agent to check any problem of the network connecting
   
  3. I connect my phone to the Ethernet port of Router, but my phone cannot acquire IP.
    Reason 1: Incorrect ports connection
Check whether your phone connected to the Uplink port of Router. Do not connect to the Uplink
port.
Reason 2: Some Router would lock on the MAC addresses of network devices.
Please connect your phone and Cable Modem with Ethernet Cable. First cut the power of the
Cable Modem and then restart the modem. At last, restart the phone.
If the problem is not solved, contact your agent to check any problem of the network connecting
ports.
   
  4. I use the Ethernet cable provided by my ISP to connect to my phone directly, but my phone cannot acquire IP.
    Your ISP or network administrator may restrict the MAC addresses of network devices. It restricts
the connection of not permitted devices. Contact your ISP or network administrator for solution.
   
  5. I can login with my USB phone, but I cannot login with my RJ45 phone.
    (i) Go to Menu "Setting Options" and press SET/OK to enable "Remote Permission".
(ii) Leave the phone, turn on a computer (in the same subnet of the phone) and go to MSDOS.
In MSDOS:
(a) Enter: "telnet xxxxxx"(your phone IP), then Enter
(b) Enter the phone password(default as "1234"), then Enter
(c) Enter: "set serviceport 1710", then Enter
(d) Enter: "write", then Enter
Check whether your phone login after restart. If failed, contact your agent for technical support.
   
  C User Questions
  1. My phone shows "Ready For Call", but it cannot dial or receive call
    Reason 1: Network connection cut
The network connection may be cut or the Ethernet cable of your phone loosed. Your RJ45 phone
cannot detect the disconnection immediately. Check your network environment and whether the
Ethernet cable of your phone loosed. To solve, connect the Ethernet cable tidily and restart your
phone or wait for approximate 5 mins after reconnect the Ethernet cable.
Reason 2: Firewall may exist in your network or you use network devices or software with
firewall functions. The firewall chops the communication.
Please first inquire your agent to get server IP, then contact your ISP or network administrator to
cancel the following restrictions: the restriction that the connection from the phone IP to the
TCP1730 and 1721 ports of server IP; the restriction that the connection from server IP to the TCP
1730 and 1721 ports of your phone IP.
   
  2. My phone can dial out, but not receive.
    Reason: Firewall may exist in your network or you use network devices or software with firewall
function. The firewall chops the communication.
If your phone uses public IP, you can use a PC already online (under MSDOS):
(i) Enter: "telnet xxxxxx(your phone IP) 1730"
(ii) If connection failed, all the communication ports are chopped by firewall.
Please first inquire your agent to get server IP, then contact your ISP or network administrator to
cancel the following restrictions: the restriction that the connection from server IP to the TCP 1730
and 1721 ports of your phone IP.
   
  3. Always hear busy tone when dial to a certain phone from my phone, but I can dial to other phones.
    Reason 1: Receiver busy.
Reason 2: If you are dialing a regular phone (PSTN, cell phone, etc.), it may be the problem of the
service carrier. Contact your service carrier, ISP or agent.
Reason 3: If you are dialing an IP phone, the receiver may not be online or cannot receive the call.
(Refer to Question 7 for details)
   
  4. Call quality
    (i) Voice Delay
It always caused by the network delay. You can test the delay by using a PC which connects
to Internet and in the same subnet of your RJ45 phone. Refer to General Question 1 for
detailed testing instruction.
(ii) Voice jitter
It always caused by the network jitter. You can test the jitter by using a PC which connects to
Internet and in the same subnet of your RJ45 phone. Refer to General Question 1 for detailed
testing instruction.
(iii) Voice loss
It always caused by the package loss of the network. You can test the package loss percentage
by using a PC which connects to Internet and in the same subnet of your RJ45 phone. Refer
to General Question 1 for detailed testing instruction.

To protect the voice quality, require the network:
Delay: less than 400ms
Jitter: less than 100ms
Package loss percentage: less than 10%
Bandwidth: more than 30Kbps

   



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