Product specifications

Dialogic® BorderNet™ 4000 SBC Product Description Document
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H.323 calls are interworked to or from SIP calls. The BorderNet 4000 H.323-IWF can act as
a direct gateway or a gatekeeper-managed gateway in an H.323 peering network.
IWF
BN4000
H323 GW
SIP UA
Carrier A
Carrier B
SIP Core
GK
RAS
RAS
Call
Signaling
Call
Signaling
SIP
The BorderNet 4000 H.323-IWF provides:
• Default settings for translation parameters
• Support for H.323 gatekeepers (both direct and gatekeeper-routed call models)
• Support for audio, video, and fax sessions
• Support for fast-start and slow-start calls
• Logical channel support, including:
o Providing a seamless exchange for opening, reopening, changing, and closing
media channels during a call
o Supporting unidirectional channel openings
• The ability to apply normal SIP call routing (IWF does not need to know about proxy
servers)
• ToS field settings for H.323 signaling
IWF Call Flow Support
The BorderNet 4000 SBC supports the following call flows:
Call Flow/Type Description
SIP upstream, H.323 fast-start
downstream
The offer received on the SIP INVITE is supported.
SIP upstream, H.323 slow-start
downstream
After the offer is received on the SIP INVITE, the
BorderNet 4000 SBC attempts an H.323 fast-start
downstream. If the downstream endpoint does not
support a fast-start, the 4000 SBC switches to a
slow-start procedure.
SIP upstream, H.323
downstream (fast-start or
No offer is received on the SIP INVITE.