Specifications

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A31003-H3580-M103-2-76A9, 01-2009
7-152 HiPath 3000/5000 V8 - HG 1500 V8, Administrator Documentation
hg-07.fm
Voice Gateway
● Max. UDP Datagram Size for T.38 Fax: Shows the maximum size of a T.38 UDP datagram
in bytes.
● Error Correction Used for T.38 Fax (UDP): This field defines which method is to be used
for error correction (t38UDPRedundancy and t38UDPFEC).
Misc.
● ClearChannel: A ClearChannel is an open channel, in which the terminal devices are re-
sponsible for the protocol in the channel. The parameter defines whether the ClearChannel
interface functionality is to be enabled for T3/E3 connections or not.
● Frame Size: You can set the sampling rate in this field. Possible settings are 10, 20, 30, 40,
50, and 60 milliseconds (msec). The default setting is 20 msec.
● Transmission of Fax/Modem Tones according to RFC2833:
Events supported: 32 to 36 and 49. For a detailed description of the standard
see http:///www.faqs.org/rfcs/rfc2833.html
● Transmission of Dtmf Tones according to RFC2833:
Events supported: 0 to 15. For a detailed description of the standard
see http:///www.faqs.org/rfcs/rfc2833.html
● Redundant Transmission of RFC2833 Tones according to RFC2198:
All tones transmitted by RFC2833 are secured according to RFC2198, provided that
RFC2198 is active.
For a detailed description of the standard see http:///www.faqs.org/rfcs/rfc2833.html and
http:///www.faqs.org/rfcs/rfc2198.html
Click Apply followed by OK in the confirmation mask (save the new configuration status perma-
nently with the Save icon in the control area).
>
Codec G729 is identical to codec G729A, and codec G729B is identical to codec
G729AB (no difference in terms of payload). Codecs G729 and G729B are therefore
deactivated by default.
From the perspective of H323 signaling, codecs G729 and G729A are different to
codecs G729B and G729AB.
Some non-HiPath H323 endpoints (Cisco GK) use the codec G729 or G729B for
H323 signaling. In this case, the codecs G729 and G729B must also be used in the
HiPath 3000/5000 V8 - HG 1500 V8.
Codecs G729 and G729B can remain inactive in a HiPath-only network.