3.2 Advanced Configuration

3.2.1 System setting

prack

ROH (FXS only)

Send billing signal (FXS only)

T.38 NoAttribute

FAX redundancy depth

T.38 FAX Type

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. 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. Polarity Reversal for billing signal, you can enable (Reverse)/Disable the feature.

No attribute (Fax version, BitRate, Buffer, Datagram…) indicated in T.38 Re-Invite with Session Description Protocol (SDP).

You can Enable/Disable this option. Specify the resend times (0~3)for FAX error packet,

Select the FAX Type to use, you can choose the following:

zT.38

zByPass

36

Page 37
Image 37
NEC SP5008A user manual Advanced Configuration, System setting