General Product Description
Sopho 2000IPS
Release 12.2, August 2006
NEC Philips Unified Solutions
UPD
41 of 259
© NEC Philips Unified Solutions, 2006. All right reserved.
Reproduction in whole or in part is prohibited without the written consent of the copyright owner.
The feature also provides functions for analyzing problems regarding SIP trunk calls. It
can collect call logs on SIP trunk calls. These statistics can be retrieved by MATWorX.
Outband DTMF
The 2000 IPS SIP trunk supports out-of-band DTMF based on RFC2833, which provides
more reliable DTMF digits transmission over a SIP network.
This feature provides DTMF digits transmission between the IPS SIP Trunk and an
external SIP terminal using RTP packets (out-of-band signals), instead of using regular
audio packets.
When the outband DTMF packets are received from the external SIP terminal, the IPS
detects the digits information from the received RTP packets and send the DTMF
tones to the IPS station.
When sending the outband DTMF packets to the external SIP terminal, the IPS
converts the DTMF tones received from the station to the RTP packets based on
RFC2833, instead of regular audio packets.
Tone Disabler
This feature is designed for improved FAX communications over SIP network.
By detecting phase inversion of FAX signal tone (V.25 2100Hz tone), the system changes
a setting of an echo canceller and NLP (Non Linear Processor) for the SIP trunk
connection.
When the phase inversion is detected, the echo canceller and NLP set OFF for the
FAX communications.
When the phase inversion is not detected, the echo canceller and NLP remains the
same as voice communications.
This feature can be effective on a SIP trunk card basis by system data programming.