ZyXEL Communications P-2602 manual VoIP SIP Settings Advanced, Voice

P-2602H(W)(L)-DxA Series User’s Guide

Each field is described in the following table.

Table 55 VoIP > SIP Settings > Advanced

LABEL	DESCRIPTION
SIP Account	This field displays the SIP account you see in this screen.
SIP Server Set-
tings
URL Type	Select whether or not to include the SIP service domain name when the ZyXEL
	Device sends the SIP number.
	SIP - include the SIP service domain name.
	TEL - do not include the SIP service domain name.
Expiration Dura-	Enter the number of seconds your SIP account is registered with the SIP register
tion	server before it is deleted. The ZyXEL Device automatically tries to re-register your
	SIP account when one-half of this time has passed. (The SIP register server might
	have a different expiration.)
Register Re-send	Enter the number of seconds the ZyXEL Device waits before it tries again to regis-
timer	ter the SIP account, if the first try failed or if there is no response.
Session Expires	Enter the number of seconds the ZyXEL Device lets a SIP session remain idle
	(without traffic) before it automatically disconnects the session.
Min-SE	Enter the minimum number of seconds the ZyXEL Device lets a SIP session
	remain idle (without traffic) before it automatically disconnects the session. When
	two SIP devices start a SIP session, they must agree on an expiration time for idle
	sessions. This field is the shortest expiration time that the ZyXEL Device accepts.
RTP Port Range
Start Port	Enter the listening port number(s) for RTP traffic, if your VoIP service provider
End Port	gave you this information. Otherwise, keep the default values.
	To enter one port number, enter the port number in the Start Port and End Port
	fields.
	To enter a range of ports,
	• enter the port number at the beginning of the range in the Start Port field.
	• enter the port number at the end of the range in the End Port field.
Voice Compres-	Select the type of voice coder/decoder (codec) that you want the ZyXEL Device to
sion	use. G.711 provides higher voice quality but requires more bandwidth (64 kbps).
	• G.711A is typically used in Europe.
	• G.711u is typically used in North America and Japan.
	In contrast, G.729 only requires 8 kbps.
	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.
Primary Compres-	Select the ZyXEL Device’s first choice for voice coder/decoder.
sion Type
Secondary Com-	Select the ZyXEL Device’s second choice for voice coder/decoder. Select None if
pression Type	you only want the ZyXEL Device to accept the first choice.
Third Compres-	Select the ZyXEL Device’s third choice for voice coder/decoder. Select None if you
sion Type	only want the ZyXEL Device to accept the first or second choice.

160 Chapter 11 Voice