Huawei B2368 User Manual page 122

LTE CPE B2368
User Guide
Label
SIP Service Domain
RFC Support
PRACK (RFC
3262)
DNS SRV Enabled (RFC
3263)
Session Timer (RFC
4028)
VoIP IOP Flags - Select VoIP inter-operability settings.
Please select VoIP IOP Flag options according to information given by your Service
Provider.
RTP Port Range
Issue 03 (2019-01-31)
Description
Enter the SIP service domain name. In the full SIP URI, this is
the part after the @ symbol. You can use up to 63 printable
ASCII Extended set characters.
RFC 3262 defines a mechanism to provide reliable
transmission of SIP provisional response messages, which
convey information on the processing progress of the request.
This uses the option tag 100rel and the Provisional Response
ACKnowledgement (PRACK) method.
Select Supported or Required to have the LTE Device include
a SIP Require/Supported header field with the option tag
100rel in all INVITE requests. When the LTE Device receives
a SIP response message indicating that the phone it called is
ringing, the LTE Device sends a PRACK message to have both
sides confirm the message is received.
If you select Supported, the peer device supports the option
tag 100rel to send provisional responses reliably.
If you select Required, the peer device requires the option tag
100rel to send provisional responses reliably.
Select Disabled to turn off this function.
Select this to have the LTE Device query your ISP's DNS
server for a list of any available SIP servers that it maintains.
This is useful if your static SIP server experiences difficulties,
making it hard for your IP phone users to make SIP calls.
Select this to have the LTE Device support RFC 4028.
This makes sure that SIP sessions do not hang and the SIP line
can always be available for use.
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