AudioCodes Mediant 800B User Manual page 383

User's Manual
Parameter
Keep Alive
Proxy Keep-Alive
proxy-enable-keep-alive
[ProxySet_EnableProxyKeepAl
ive]
Version 7.2

Incoming calls: If the 'Transport Type' parameter (in this table)
is set to TLS and the incoming call is successfully classified to an
IP Group based on the Proxy Set, this TLS Context is used. If the
'Transport Type' parameter is set to UDP or classification to this
Proxy Set fails, the TLS Context is not used. Instead, the device
uses the TLS Context configured for the SIP Interface (see
'Configuring SIP Interfaces' on page 357) used for the call;
otherwise, the default TLS Context (ID 0) is used.

Outgoing calls: If the 'Transport Type' parameter is set to TLS
and the outgoing call is sent to an IP Group that is associated
with this Proxy Set, this TLS Context is used. Instead, the device
uses the TLS Context configured for the SIP Interface used for
the call; otherwise, the default TLS Context (ID 0) is used. If the
'Transport Type' parameter is set to UDP, the device uses UDP
to communicate with the proxy and no TLS Context is used.
To configure TLS Contexts, see 'Configuring TLS Certificate
Contexts' on page 113.
Enables the device's Proxy Keep-Alive feature, which checks
communication with the proxy server.

[0] Disable (default).

[1] Using OPTIONS = Enables the Proxy Keep-Alive feature
using SIP OPTIONS messages. The device sends an OPTIONS
message every user-defined interval, configured by the 'Proxy
Keep-Alive Time' parameter (in this table). If the device receives
a SIP response code that is configured in the 'Keep-Alive Failure
Responses' parameter (in this table), the device considers the
proxy as down. You can also configure whether to use the
device's IP address or string name ("gateway name") in the
OPTIONS message (see the UseGatewayNameForOptions
parameter).

[2] Using REGISTER = Enables the Proxy Keep-Alive feature
using SIP REGISTER messages. The device sends a
REGISTER message every user-defined interval, configured by
the RegistrationTime parameter (Gateway application) or
SBCProxyRegistrationTime parameter (SBC application). Any
SIP response from the proxy - success (200 OK) or failure (4xx
response) - is considered as if the proxy is "alive". If the proxy
does not respond to INVITE messages sent by the device, the
proxy is considered as down (offline).
Note:

Proxy keep-alive using REGISTER messages (Using
REGISTER option) is applicable only to the Parking redundancy
mode ('Redundancy Mode' parameter configured to Parking).

For Survivability mode for User-type IP Groups, you must enable
this Proxy Keep-Alive feature.

If you enable this Proxy Keep-Alive feature and the proxy uses
the TCP/TLS transport type, you can enable CRLF Keep-Alive
feature, using the UsePingPongKeepAlive parameter.

If you enable this Proxy Keep-Alive feature, the device can
operate with multiple proxy servers (addresses) for redundancy
and load balancing (see the 'Proxy Load Balancing Method'
383
17. Control Network
Description
Mediant 800B Gateway & E-SBC