ELTEX TAU-32M.IP, Operation Manual, Page: 94 / 334

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94 Universal Network Terminal TAU-32M.IP
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100rel –use reliable provisional responses (RFC3262):
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supported –reliable provisional responses are supported;
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required –reliable provisional responses are mandatory;
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off –reliable provisional responses are disabled.
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Enable timer –when checked, enables support of SIP session timers (RFC 4028). During the voice session,
UPDATE requests (if the opposite gateway supports them) or re-INVITE requests should be sent for
connection management purposes;
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Min SE –minimal time interval for connection health checks (90 to 1800s, 120s by default);
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Session expires – period of time in seconds that should pass before the forced session termination if the
session is not renewed in time (90 to 80000s, recommended value–1800s, 0–unlimited session).
NAT settings:
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NAT Keep Alive Msg –selection of an active session support mode for operations through NAT;
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Off – disabled;
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options –use OPTIONS request as an active session support message;
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notify –use NOTIFY notification as an active session support message;
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CRLF – use CRLF special request as an active session support message.
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NAT Keep Alive Interval (s) –active session support message transmission period. Permitted values – 30 to
120 seconds.
Conference settings:
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Conference mode– conference assembly mode selection;

Local –conference assembly is performed locally at the gateway. Voice packets are mixed at the
gateway;
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Remote (REFER to Focus) –conference assembly is performed at the conference server. Voice packets
are mixed at the server. In this mode, gateway sends to server the information on gateways which
should be added to the conference. Next, conference server will add these gateways to the
conference;
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Remote (REFER to User) –conference assembly is performed at the conference server. Voice packets
are mixed at the server. In this mode, gateway sends to subscribers the identifier of a conference,
that they should connect to at the conference server. Next, gateways will add themselves to the
conference.
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Conference server –conference server name in Remote mode operation;
IMS settings:
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Enable IMS –enable service (simulation service) management using IMS (3GPP TS 24.623);
Gateway supports:
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Implicit subscription to IMS services – in this subscription option, gateway will not send SUBSCRIBE
For conference operation algorithms in various modes, see Section: 7.3 3-way conference.