User guide

3-17
Cisco H.323 Signaling Interface User Guide
OL-2156-04 Rev. A1
Chapter 3 Provisioning the Cisco HSI
Configuring HSI Release 2.21 Features
prov-add:trnkgrpprop:name="2000",AllowH323Hairpin="1"
prov-add:trnkgrpprop:name="3000",AllowH323Hairpin="1"
Note H.323 Hairpin must be enabled for both the ingress and egress EISUP trunk groups.
Refer to PGW and Cisco IOS documentation at www.cisco.com for further information on these
commands.
T.38 Fax
You enable T.38 Fax for the HSI by specifying static system data parameters. By default, T.38 is
provisioned on the HSI by use of the following commands:
prov-add:name=sys_config_static,t38maxval="MaxBit 0x90, FxMaxBuf 0xc8, FxMaxData 0x48"
prov-add:name=sys_config_static,t38options="FxFillBit 0, FxTransMMR 0, FxTransJBIG 0,
FxRate Trans, FxUdpEC Red"
Table 3-3 describes the T.38 static system data parameters. The T.38 parameters for HSI correspond to
T.38 parameters proposed in the ITU T.38 recommendation.
Configuring T.38 Fax on the Cisco PSTN Gateway
To enable T.38 Fax throughout the system, you must enable T.38 Fax on the Cisco PGW. On the PGW,
T.38 is enabled through a trunk group property by use of the following MML command:
prov-add:trnkgrpprop:name="2000",FaxSupport="1"
Configuring T.38 Fax on a Cisco IOS H.323 Gateway
Enable T.38 Fax on a Cisco IOS H.323 gateway by issuing the following IOS commands:
voice service voip
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
Configuring T.38 Fax on a Cisco IOS MGCP Gateway
Enable T.38 fax on a Cisco IOS MGCP gateway by issuing the following IOS commands:
voice service voip
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
mgcp package-capability fxr-package
Refer to PGW and Cisco IOS documentation at www.cisco.com for further information on these
commands.