User's Manual 9. Configuring VoIP Parameters
Version 4.4.3 75 MP-20x Multimedia Home Gateway
Parameter Description
Gateway Name - User Domain
proxy_gateway
Defines the device's domain name which is sent in the SIP
From header of outgoing INVITE messages.
Note: This parameter appears only in 'Advanced' mode.
user_agent
Defines the user agent parameter that is used in SIP packet
headers.
configured_user_agent
Replaces the default user_agent with the following format:
AudioCodes MP202B; <MAC>
Enable PRACK
prack/enabled
When enabled, the device replies with a PRACK message
upon receipt of a reliable provisional response. The device
does not initiate reliable provisional responses.
Note: This parameter appears only in 'Advanced' mode.
Include ptime in SDP
sdp_include_ptime
When enabled, the device adds the ptime field to the SDP
message body.
Note: This parameter appears only in 'Advanced' mode.
advanced_dns
This parameter is automatically configured to:
[DNS SRV] - If the SIP Proxy/Outbound Proxy port is
configured to "65535"
[NAPTR] – If the SIP Protocol is set to "UNDEFINED"
Note: The default value is "Disabled".
Enable rport
rport/enabled
When enabled, the device adds the rport parameter to the
relevant SIP message fields.
Note: This parameter appears only in 'Advanced' mode.
Connect media on 180
connectMediaOn180
When enabled, media is connected upon receipt of SIP 180,
183, or 200 messages. When this parameter is disabled,
media is connected upon receipt of 183 and 200 messages
only.
Note: This parameter appears only in 'Advanced' mode.
Enable Keep Alive
ka_options/enabled
When enabled, a keep-alive notification is sent every user-
defined interval to the SIP registrar server.
Note: This parameter appears only in 'Advanced' mode.
Keep-Alive Type
ka_options/ka_type
The type of keep-alive mechanism sent to the SIP registrar:
• Using SIP OPTIONS: sends SIP OPTIONS messages
• Using an Empty UDP packet: sends empty UDP
packets
Note: This parameter is available only if the ‘Enable Keep
Alive’ check box is selected.
Keep-Alive Period
ka_options/timeout
Defines the periodic interval for keep-alive messages.
Note: This parameter is available only if the ‘Enable Keep
Alive’ check box is selected.
SIP Proxy and Registrar
Use SIP Proxy
use_proxy
When checked, outgoing calls are routed to the configured
SIP proxy. If the 'Use SIP Proxy IP and Port for Registration'
check box is also selected, the configured SIP proxy is also
used as the registrar, allowing incoming calls.
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