2 advanced configuration, 1 system setting – NEC SP5008A User Manual
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3.2 Advanced Configuration
3.2.1 System setting
prack
PRACK is defined in RFC 3262: Reliability of
Provisional Responses in SIP. You can
accommodate your softswitch (Proxy Server) to
Enable or Disable this feature.
ROH (FXS only)
Receiver-Off-Hook (ROH) Tone
A ROH tone is sent to the subscriber to inform
him that his receiver is off-hook.
You can Enable/Disable this option.
Send billing signal (FXS only)
Polarity Reversal for billing signal, you can
enable (Reverse)/Disable the feature.
T.38 NoAttribute
No attribute (Fax version, BitRate, Buffer,
Datagram…) indicated in T.38 Re-Invite with
Session Description Protocol (SDP).
You can Enable/Disable this option.
FAX redundancy depth
Specify the resend times (0~3)for FAX error
packet,
T.38 FAX Type
Select the FAX Type to use, you can choose the
following:
z
T.38
z
ByPass