Changing codecs during
rotary dial peer selection is not supported.
Voice class codec is not
capabilities on dial peers for fast start-to-early media scenarios.
Delayed Offer to Slow-Start is not
supported for SRTP-to-SRTP H.323-to-SIP calls.
During a triggered INVITE scenario
the Cisco UBE always generates a delayed offer INVITE.
delayed-media signal interworking is not supported.
Fast Start to
Early Offer Supplementary Service will not work without extended capabilities
configured under dial-peer.
GSMFR and GSMEFR
codecs are not supported.
flow-around is not supported.
diversion headers or multiple contact header in 302 to the H.323 leg is not
supplementary scenarios is not supported.
is not supported.
Supplementary Services based on H.450 is not supported.
early media signal interworking is not supported.
services are Empty Capability Set (ECS) based supplementary services from the
H.323 perspective, not H.450 supplementary services.
LTI based transcoding is
supplementary calls is not supported.
SCCP based codec
transcoding is not support with an exception of Delayed-Offer to Slow-Start
with static codec.
DTMF interworking rtp-nte
to inband is supported only with non-high-density transcoding in a
delayed-offer to slow-start call.
enables the IP-to-IP gateway to bridge calls between networks that support
different VoIP call-signaling protocols (SIP and H.323). The SIP-to-H.323
protocol interworking capabilities of the CUBE support the following:
voice calls (G.711 and G.729 codecs)
SIP (UDP)<—>H.323 (TCP)
SIP (TCP)<—>H.323 (TCP)
SIP (UDP)<—>H.323 (UDP)
SIP (TCP)<—>H.323 (UDP)
Default SIP protocol is UDP. Default H.323 protocol is TCP.
H.323 Fast-Start and SIP early-media signaling
H.323 Slow-Start and SIP delayed-media signaling
H.323 Fast Start<—>SIP Early Media
H.323 Slow Start <—>SIP Delay Media
No other combinations are supported. For example, H.323 Slow
Start <—>SIP Early Media is not supported and results in call failure.
H.323-to-SIP RSVP Support
The following cases are supported (acc-qos and reg_qos):
H.323 to H.323 with only one leg having RSVP
H.323 to H.323 with both legs having RSVP
H.323 to SIP with only one leg having RSVP
H.323 to SIP with both legs having RSVP
H.245 alpha/signal<—>SIP Notify
alpha/signal <—>SIP RFC 2833
alpha/signal <—> SIP KPML
Inband DTMF<—>RFC 2833
Voice call transcoding support
Only voice and DTMF are supported. (G.711-G.729)
Codec transparent and codec filtering is not supported