How to configure Yealink phones with Cloud voice Go

You will need:

• Server hostname, such as UCM123.btwave.co.uk
• Extension number, such as 1234
• SIP password
• New/Temporary/Ported phone number
• The local (LAN) IP address of your Yealink phone

If you are re-purposing/recycling an existing phone you can hold the "OK" button for 10 seconds to force a factory reset, after which the default password should be "admin". 

IMPORTANT: Ensure latest Yealink firmware (not phone provider's custom FW)

• For current products: https://support.yealink.com/en/portal/home
• For End-of-Life products: https://support.yealink.com/en/portal/home?categoryId=44
• DECT base and DECT handsets: you must upgrade the base firmware first, then the individual handset(s)
• Reset to factory defaults

Get phone IP address

On most Yealink desk phones clicking the OK button will show the IP address on the screen. For wireless phones:

• Press OK > Status > Base > [Note IP address]

(If the DECT handset has not yet been registered with the base, hold the button on base until light  flashes, then on handset go to OK > Settings > Register > use pin 0000)

Change default password "admin"

Try to use 12+ characters, UPPER (A-Z) and lower case (a-z) plus numeric (0-9) to secure password; one idea is to use the MAC address, with the first 6 characters UPPER case, and the rest lower case.

NOTE: It is essential to keep the phone secure so that it isn't easily hacked, potentially blacklisting the number and amassing unexpected bill.

Config a Yealink desk phone

In this example we use a T48G model, but most Yealink desk phones will have identical GUI menus.

Yealink desk phone step 1: Enter account details

Enter the IP address of the Yealink phone into a web browser and log in as admin (change the admin password "admin" as advised above if not already secure). Navigate to Account [tab] > Register [menu] > (enter the account fields)

• Line Active: Enabled
• Register Name: (Extension number, such as 1234)
• User Name: (Extension number, such as 1234; same as Register Name)
• Password: (SIP Password)
• Server host: (Server hostname, such as UCM123.btwave.co.uk)
  [Click Confirm button]

Yealink desk phone step 2: Secure device from network attacks

Navigate to Features [tab] > General Information [menu] > (enable options for added security)

• Accept SIP Trust Server Only: ENABLE
• Allow IP Call: DISABLE
  [Click Confirm button]

Test calls in both directions, and see additional tips at the end of this article...

Config a Yealink desk phone

In this example we use a W70B model, but most Yealink desk phones will have identical GUI menus.

Yealink DECT (wireless) phone step 1: Enter account details

Enter the IP address of the Yealink phone into a web browser and log in as admin (change the admin password "admin" as advised above if not already secure). Navigate to Account [menu] > Register [sub-menu] > (enter the account fields)

• Line Active: Enabled
• Register Name: (Extension number, such as 1234)
• User Name: (Extension number, such as 1234; same as Register Name)
• Password: (SIP Password)
• Server Host: (Server hostname, such as UCM123.btwave.co.uk)
  [Click Confirm button]

Yealink DECT (wireless) phone step 2: Secure device from network attacks

Navigate to Features [tab] > General Information [menu] > (enable options for added security)

• Accept SIP Trust Server Only: ENABLE
• Allow IP Call: DISABLE
  [Click Confirm button]

Yealink DECT (wireless) phone step 3: Verify all handsets are assigned to the correct account

If using more than 1 handset on the same base you can either add a unique account for each handset (separate phone number and line), or have more than 1 handset share a single account (same phone number). To verify, navigate to Account > Number Assignment > (tick all boxes for both INCOMING and OUTGOING where you want multiple handsets to share a single account)

In this example handsets 1 & 2 both receive (incoming) and make (outgoing) calls using account 1:

Test calls in both directions, and see additional tips at the end of this article...

Tips and features

Date & time

Navigate to Settings > Date & Time > (Set values as required)

• DHCP time: Enabled
• Time Zone: (usually 0 GMT; Western European Time)
• Location: (usually United Kingdom London)
  [CONFIRM button]

Voicemail

The voicemail number is *97 but most handsets have a dedicated Voicemail button. The code *97 can be programmed into most Yealink handsets; see article https://support.yealink.com/en/portal/knowledge/show?id=6458b6dfb1fa936c57b568bc

Handset > OK > Voice Mail, select On from the Status field, and select Set Number. 

Unconditional Call Forward - using keypad on handset

TURN ON CALL FORWARING

Off hook the phone (pick up the handset)

Dial *72 then the number to forward the call to  - example *72 01234567890

Press OK softkey or SEND key (aka "dial")

TURN OFF CALL FORWARDING

Off hook the phone (pick up the handset)

Dial *73

Press OK softkey or SEND key (aka "dial") 

Tip: The above strings of numbers (preceded by asterisk *) can be programmed to a physical or soft key on the handset

Navigate to Features > Forward & DND > (Enter codes in the "On Code" / "Off Code" fields, such as under "DND")

...or navigate to Features > Speed Dial

Other features

See feature codes for other features including: Caller ID, Holding, Forwarding, Transfer, Voicemail, Waiting, Parking, Do-not-Disturb (DND), Pickup, Meeting, Ring simultaneously, Ring group, Follow Me, Shared Call Appearance (SCA), Wakeup service

https://documentation.grandstream.com/knowledge-base/service-guide