ITU-T V.150.1

TABLE 6/V.150.1
Modem Relay Mode
Parameter
Supported Modem Relay Type
Value
V-MR / U-MR
15.2.4 Modulation support
A list of the V-series modulations supported in Modem Relay mode by the Gateway.
The list is comprised of V.17, V.21, V.22/V.22 bis, V.23 (duplex and half-duplex), V.26 bis,
V.26 ter, V.27 ter, V.32/V.32 bis, V.34 (duplex and half-duplex), V.90 (analogue and
digital), V.91 and V.92 (analogue and digital).
15.2.5 VBD parameters
The specification of the VBD parameters are beyond the scope of this Recommendation. See clause
8.1.
15.2.6 Answer tone treatment
As part of the Answer tone processing, all MoIP Gateways are required to support and indicate at a
minimum the following RFC 2833 events:
ANS (32), /ANS (33), ANSam (34) and /ANSam (35).
15.2.7 SPRT Parameters
If the default IP-TLP SPRT is to be used, then the following parameters are required to be
indicated:
Maximum payload size of SPRT channels 0 to 3 and maximum window size for SPRT
channels 1 and 2.
15.2.8 FoIP support
This parameter indicates that the Gateway has the ability to support T.38 FoIP. It is not necessary
for an external signalling mechanism to include specific indication of this ability in the MoIP
messaging set, if an alternative mechanism is already defined. However, the information as to the
peer Gateways ability to support FoIP should be passed to the MoIP application. This will allow the
Gateway to make appropriate decisions should it determine that a connection is a facsimile call
during its discrimination procedures.
Parameter
TABLE 7/V.150.1
Value
T.38 FoIP Supported Supported/Not
Supported
15.2.9 JM Delay support
This parameter indicates the ability of a Gateway to support the JM delay procedure as defined in
clause 20.7. The default is Not Supported. If both Gateways have negotiated connection scenario
MR1 and both indicate JM delay procedure support they shall follow the procedures as defined in
clause 20.7 for both On-ramp and Off-ramp Gateways.
ITU-T Rec. V.150.1 (01/2003) – Prepublished version 28