Manual configuration - Grandstream GXV 3240

Navigate to General Settings->Account->Account 1 and fill as shown below:

1. Put your account name into field number 1
2. Enter your SIP domain into field number 2
3. Enter your SIP username into field number 3
4. Enter your SIP password into field number 4
5. Enter Voicemail number #445 into field number 5
6. Click Save

Call Settings

Go to Call settings and fill as shown below

1.Put Dialpplan { x+ | *x+ | *xx*x+ | #xxx | #x+ | #x+* } into field number 1

2.Make sure that "use # as Dial Key" is unmarked under field number 2

3.Click Save

Codec Settings

Navigate to Codec settings

1. Put only PCMU and PCMA into selected codec field under point 1
2. Click Save