Medias Mediatrix 1204, Reference Manual

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Chapter 29 - Troubleshooting Fax Issues
286 Mediatrix 1204
D
ESCRIPTION
: The T.38 fax transmission fails.
P
OSSIBLE
C
AUSE
: The Mediatrix 1204 opens the T.38 channel only after receiving the “200 OK”
message from the peer. This means that the Mediatrix 1204 cannot receive T.38 packets before
receiving the “200 OK”. Based on RFC 3264, the T.38 channel should be opened as soon as the unit
sends the “INVITE” message.
Information from RFC 3264 (An Offer/Answer Model with Session Description Protocol (SDP)) - section
5.1: Once the offerer has sent the offer, it must be prepared to receive media for any recvonly streams
described by that offer. It must be prepared to send and receive media for any sendrecv streams in the
offer, and send media for any sendonly streams in the offer (of course, it cannot actually send until the
peer provides an answer with the needed address and port information). In the case of RTP, even
though it may receive media before the answer arrives, it cannot send RTCP receiver reports until the
answer arrives.
S
OLUTION
: Be sure to reply to the “INVITE” message by a “200 OK” before sending any T.38 message
to the Mediatrix 1204.
Tested Fax Models
The following table lists the fax models tested with the Mediatrix 1204 for the T.38 protocol. Each of these fax
models has been emulated and tested with each other by using the FaxLab
®
fax/telephony testing tool.
Table 181: Tested Fax Models
Make Models
Brother • 6650MC
• 7150C
• FAX-190
• FAX-580MC
• Intellifax 600
• Intellifax 625
• Intellifax 950M
• Intellifax 2500
• MFC 4550
• MFC 4600
• MFC 4650
Panasonic • KXF-500
• KXF-580
• KXF-1600
• KXF-3000
• KX-FP270
• KX-FPC95
• PX-5
• PX-150
• PX-350
• UF-880
• UF-V60
Sharp • FO-145
• FO-235
• FO-445
• FO-5400
• UX-104
• UX-108
• UX-117
• UX-256
• UX-460
• UX-1400
• UX-3600M
Canon • B70
• Fax 750
• Fax B340
• L777
• MultiPass C530
• MultiPass C545
• MultiPass C555
• MultiPass C560
• MultiPass C755
• MultiPass C2500
• MultiPass C5500
• MultiPass L6000
• MultiPass TF-301
Xerox • 3004
• 7021
• 7024
• 7033
• WorkCenter 250
• WorkCenter 470cx
• WorkCenter 480cx
• WorkCenter
XE90fx
• WorkCenter
XK50cx