AudioCodes Mediant 500 E-SBC, User Manual

Page: 766 / 920

User's Manual 766 Document #: LTRT-10437
Mediant 500 E-SBC
Parameter Description
[ZeroSDPHandling]
Determines the device's response to an incoming SDP that includes an
IP address of 0.0.0.0 in the SDP's Connection Information field (i.e.,
"c=IN IP4 0.0.0.0").

[0] = (Default) Sets the IP address of the outgoing SDP's c= field to
0.0.0.0.

[1] = Sets the IP address of the outgoing SDP c= field to the IP
address of the device. If the incoming SDP doesn’t contain the
"a=inactive" line, the returned SDP contains the "a=recvonly" line.
Web/EMS: Enable Delayed
Offer
CLI: delayed-offer
[EnableDelayedOffer]
Determines whether the device sends the initial INVITE message with
or without an SDP. Sending the first INVITE without SDP is typically
done by clients for obtaining the far-end's full list of capabilities before
sending their own offer. (An alternative method for obtaining the list of
supported capabilities is by using SIP OPTIONS, which is not
supported by every SIP agent.)

[0] Disable = (Default) The device sends the initial INVITE message
with an SDP.

[1] Enable = The device sends the initial INVITE message without
an SDP.
[DisableCryptoLifeTimeIn
SDP] Enables the device to send "a=crypto" lines without the lifetime
parameter in the SDP. For example, if the SDP contains "a=crypto:12
AES_CM_128_HMAC_SHA1_80
inline:hhQe10yZRcRcpIFPkH5xYY9R1de37ogh9G1MpvNp|2^31", it
removes the lifetime parameter "2^31".

[0] Disable (default)

[1] Enable
Web/EMS: Enable Contact
Restriction
CLI: contact-restriction
[EnableContactRestriction
]
Determines whether the device sets the Contact header of outgoing
INVITE requests to ‘anonymous’ for restricted calls.

[0] Disable (default)

[1] Enable
CLI: anonymous-mode
[AnonymousMode]
Determines whether the device's IP address is used as the URI host
part instead of "anonymous.invalid" in the INVITE's From header for
Tel-to-IP calls.

[0] = (Default) If the device receives a call from the Tel with blocked
caller ID, it sends an INVITE with
From: “anonymous”<anonymous@anonymous.invalid>

[1] = The device's IP address is used as the URI host part instead
of "anonymous.invalid".
This parameter may be useful, for example, for service providers who
identify their SIP Trunking customers by their source phone number or
IP address, reflected in the From header of the SIP INVITE. Therefore,
even customers blocking their Caller ID can be identified by the service
provider. Typically, if the device receives a call with blocked Caller ID
from the PSTN side (e.g., Trunk connected to a PBX), it sends an
INVITE to the IP with a From header as follows: From: “anonymous”
<anonymous@anonymous.invalid>. This is in accordance with RFC
3325. However, when this parameter is set to 1, the device replaces
the "anonymous.invalid" with its IP address.
EMS: P Asserted User
Name
CLI: p-assrtd-usr-name
[PAssertedUserName]
Defines a 'representative number' (up to 50 characters) that is used as
the user part of the Request-URI in the P-Asserted-Identity header of
an outgoing INVITE for Tel-to-IP calls.
The default is null.