Users Manual Part 2

Chapter 21 VoIP
PX7511-B0 User’s Guide
228
Each field is described in the following table.
Table 96 VoIP > SIP > SIP Account > Add new account/Edit
LABEL DESCRIPTION
SIP Account Selection
SIP Account
Selection
This field displays ChangeMe if you are creating a new SIP account or the SIP account you are
modifying.
SIP Service Provider Association
SIP Account
Associated with
Select the SIP service provider profile to use for the SIP account you are configuring in this
screen. You should already have configured a SIP service provider profile in the SIP Service
Provider screen.
This field is read-only when you are modifying an existing SIP account.
General
Enable SIP
Account
Select this if you want the Zyxel Device to use this account. Clear it if you do not want the
Zyxel Device to use this account.
SIP Account
Number
Enter your SIP address. In the full SIP URI, this is the part before the @ symbol. You can use up to
127 printable ASCII characters.
Authentication
Username Enter the user name for registering this SIP account, exactly as it was given to you. You can
use up to 95 printable ASCII characters.
Password Enter the user name for registering this SIP account, exactly as it was given to you. You can
use up to 95 printable ASCII Extended set characters.
URL Type
URL Type Select whether or not to include the SIP service domain name when the Zyxel Device sends
the SIP address.
SIP - include the SIP service domain name.
TEL - do not include the SIP service domain name.
Voice Features
Primary
Compression Type
Secondary
Compression Type
Third Compression
Type
Select the type of voice coder/decoder (codec) that you want the Zyxel Device to use.
G.711 provides high voice quality but requires more bandwidth (64 kbps). G.711 is the default
codec used by phone companies and digital handsets.
• G.711a is typically used in Europe.
• G.711u is typically used in North America and Japan.
G.726-24 operates at 24 kbps.
G.726-32 operates at 32 kbps.
By contrast, G.729 only requires 8 kbps.
G.722 is a 7 KHz wideband voice codec that operates at 48, 56 and 64 kbps. By using a
sample rate of 16 kHz, G.722 can provide higher fidelity and better audio quality than
narrowband codecs like G.711, in which the voice signal is sampled at 8 KHz.
The Zyxel Device must use the same codec as the peer. When two SIP devices start a SIP
session, they must agree on a codec.
Select the Zyxel Device’s first choice for voice coder/decoder.
Select the Zyxel Device’s second choice for voice coder/decoder. Select None if you only
want the Zyxel Device to accept the first choice.
Select the Zyxel Device’s third choice for voice coder/decoder. Select None if you only want
the Zyxel Device to accept the first or second choice.