Sip Trunk – Fax Pass-Through - NEC UNIVERGE SV9100 Features And Specifications

SIP Trunk – Fax Pass-Through
Description
The SV9100 supports SIP trunk Fax pass-through using either the T.38 relay or Pass-Through mode. If
the SIP Carrier supports a T.38 Fax relay, select the T.38 mode. If the SIP carrier does not support T.38
Fax relay, then select the Pass-Through mode. The type of Fax relay should be selected manually as per
the SIP carrier capability.
Conditions
This feature is supported on the SIP carrier types specified in Program 10-29-14.
When the system detects a Fax tone or Codec exchange from the other side during
conversation, the system changes to a Codec specified for Fax in Program 84-33-12.
Supported Fax Codecs are G.711 a-law, G.711 u-law and G.726.
It is necessary to set the same Fax Codec on both systems. If the Codec does not match,
the Fax call will fail. The SIP/RTP session will continue. It is necessary to perform a
disconnect operation in this case.
If one side changes the Codec and the other side does not, the FAX call will fail.
The Codec exchange will continue until the call is terminated.
To establish a Fax call, set Program 15-03-03 to 1 (Special – Receive DTMF tones after the
initial call is setup) and Program 15-03-18 to 0 (Fax).
STD SIP terminals do not support this functionality.
When the Fax call is complete, the SIP session will be disconnected.
Default Setting
Disabled
System Availability
Terminals
None
This function is not supported for STD SIP.
Trunks
SIP Trunks
Required Component(s)
VoIPDB-E1/IPLE
784