With Fmoip - Siemens HG 3500 V4 Service Manual

gateways_02_terms.fm
Terms
Fax or Modem Transmission and Detection
10

2.2.2 With FMoIP

As of HiPath 4000 V2.0, the "FMoIP" (FaxModem over IP) feature is used for the
transmission of fax and modem signals over the IP network.
FMoIP improvements
The FMoIP feature provides the following new functionality:
• DMC (Direct Media Connect) for fax/modem calls. This results in a maximum
of one IP hop (2 IP/TDM conversions) for fax/modem connections within a
local HiPath network. DMC is supported for HG 3500 / HG 3575. This is the
major improvement in comparison with the last version, where a switch back
to master call was performed after tone detection.
• The DMC endpoints HG 3500 and HG 3575 support G.711 F/M.
• T.38
T.38 is possible for
– IP trunking connections (H323 and H323A)
– SIP trunking connections (SIP-Q and native SIP)
– DMC connections from/to IPDA
T.38 is not possible for
– IPDA master connections
– HiPath 4000 SoftGate
IMPORTANT: When connecting a fax adapter to a HG 3500 (SIP
subscriber), DMC must be deactivated for this device (only then is T.38 trans-
mission possible).
If you want nonetheless to connect DMC for this device, the codec must be
set to G.711 (fax transmission with G.711, not T.38).
• RFC2833 and RFC2198 for fax/modem tones are supported for HG 3500/75
to transfer the fax/modem signals over IP.
• Enhanced DSP tone detection (incl. tone information transfer based on
RFC2833/RFC2198) for HG 3500/75 boards. Supported tones:
– call initiation tones CNG and CT (calling side)
– call answer tones ANS(CED), /ANS, ANSam, /ANSam (called side)
HiPath 4000 V5, IP Solutions - HG 3500 & HG 3575, Service Documentation
A31003-H3150-S104-2-7620, 03/2009