Nortel VoIP Gateway, Configuration Manual, Page: 20 / 220

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Other:
• Supports using a Country Code (0xB5) and Manufacturers Code (0x28) in H.323 messages
• Supports H.323 Annex D, T.38 real time FAX.
• Supports H.450 Call Hold, Call Transfer and Call Forwarding supplementary services
(H.450.1, H.450.2, H.450.3 and H.450.4).
• Supports the following codecs: G.711 A-law, G.711
µ
-law, G.723.1 (6.3 kbps, 5.3 kbps), G.729.
• Supports DTMF and HookFlash signal out of band using the H.245 channel (using the
"Alphanumeric" field).
• Supports DTMF out of band using H.225/Q.931 keypad facility messages.
• Supports of one or two stage dialing for network to VoIP Gateway calls.
• Supports reopening of logical channel and implementation of empty terminal capability set.
• Supports configurable H.323 Port Range.
• Supports H.225/Q.931 Progress Indicator parameter for Fast Connect, enabling playing of
local ringback tone or to cut through the voice channel to listen to remote call progress tones/
messages.