AudioCodes Mediant 500L - Page 1084

User's Manual 1084 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
"a=inactive" line, the returned SDP contains the "a=recvonly" line.
Enable Delayed Offer
configure voip > sip-
definition settings >
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.
configure voip > sip-
definition settings >
crypto-life-time-in-
sdp
[DisableCryptoLifeTimeInSD
P]
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
Enable Contact Restriction
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
configure voip > sip-
definition settings >
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".
The 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 the parameter is set to 1, the device replaces
the "anonymous.invalid" with its IP address.
configure voip > sip-
definition settings > 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.