User guide

Dynamix DW-E
136
Q9. In SIP Mode: Failed to hear the early media before call connected
Answer:
a. Make sure the 180 SDP or 183 SDP are enabled.
b. Make sure the remote SIP end point can cut through voice before call
connected.
Q10. Cannot send or receive the DTMF to/from far end VoIP end point.
Answer:
a. In H.323 Mode: Make sure DW-E and other endpoint use same
DTMF relay mode (e.g. H.245 Alphanumeric.)
b. In SIP Mode: Make sure DW-E and other endpoint use same
DTMF relay mode (e.g. SIP Info or RFC2833-payload type.)
c. In SIP Mode: Make sure the remote SIP end point’s RTP payload type
is supported or not.
d. If use Q.931 UUI DTMF Relay mode, make sure Gatekeeper can
correctly forward Q.931 UUI when registering to Gatekeeper is set to
true.
Q8. Does DW-E can cooperate with the Cisco VoIP products?
Answer:
The short answer is “yes”. The following configuration example can be
used for normal and fax call.
Example for H.323 Mode
Voice service voip
Fax protocol t38 ls-redundancy 1 hs-redundancy 1
Voice class codec 100 Codec
preference 1 g723r63 Codec
preference 2 g729r8 Codec
preference 3 g711ulaw Codec
preference 4 g711alaw
dial-peer voice 100 pots
application session destination-
pattern 8001 progress_ind
progress enable 8 port 1/1/0
dial-peer voice 200 voip
destination-pattern 2T
voice-class codec 100
session target ras
dtmf-relay h245-signal h245-alphanumeric
fax rate 14400
fax-relay ecm disable
fax protocol t38 ls-redundancy 1 hs-redundancy 1
no vad