The first step is to determine the IP Address of your phone. To do this, pick up your phone, select Line 1 and do the following:
Dial **** (That is 4 asterisks) once you hear the menu, dial: 110# (110 followed by pound)
The system should now playback the IP Address your device has been assigned.
Note: Some versions of Cisco IP phones (typically multi-line devices from the SPA30x and SPA50x series) provide a [setup] key (icon is one piece of paper with one corner folded). On these models, pressing [setup] then selecting 'Network' from the menu provides its IP without dialing any codes.
Using your web browser from a computer on the same network, point the address to the IP address of your phone.
(example http://192.168.1.2) Replace 192.168.1.2 by the IP Address your device is currently using.
You should now see the web interface of your phone.
click on the link "Admin", and once the page has reloaded, click again on the link "Advanced View".
Under the LINE 1 Tab, Find the following fields and fill them with the following information
Nat Keep Alive: Yes
Nat Mapping/Traversal: Yes
Register Expires: 180
Proxy Fallback Intvl: 180
Display Name: John Smith (Replace with your name or company name)
User ID: XXXX*XXX (Replace with your phone SIP username)
Password: ******** (Type in the phone SIP password)
Use DNS SRV: NO
DNS SRV Auto Prefix: NO
(On multi-line 'phones like the SPA30x/50x this tab is labelled 'Ext1', 'Ext2', 'Ext3'. The initial defaults assign all individual line keys to 'Ext1' settings. Labels are specified on the 'Phone' tab)
Step 5 (Optional)
Optionally, you can configure your adapter with a better dial plan, allowing faster dialing of 10 digits number (Local US/Canada) and also enable 7 digits dialing in one area code of your choice.
At the bottom of Line 1 TAB, you will find a field called Dial Plan
Replace the 555 digits in the following line by the area code of your choice and copy the line, including parenthesis, in the Dialplan field in Line 1 Tab (or Ext1 tab) at the bottom of the page:
Click on the "Save Settings " button at the bottom of the form. The IP 'phone may take up to 35 seconds to re-initialise.
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