Fax Over Ip With Hg 1500 - Siemens HiPath 3000 Series Service Documentation

h3h5_in_the_lan.fm
HiPath 3000/5000 in the LAN Network
HG 1500 Board
13.6.5

Fax over IP with HG 1500

Fax over IP guarantees the compatibility of traditional analog fax devices in IP telephony net-
works. The following scenarios must be taken into account when using the real-time commu-
nication system HiPath 3000 with the HG 1500 board.
For Fax over IP the IP network must meet certain quality criteria that are determined in the net-
work analysis as otherwise interruptions can occur in the fax transmission. Otherwise the con-
nection and marketing of separate trunk lines should be provided for each node.
In general, an IP trunking network is when two or more HiPath 3000 systems are networked to
each other over the integrated HG 1500 board. The HG 1500 board supports two functions for
transferring the fax information.
Fax over G.711 ("IP/IP e2e payload via enterprise proxy" connection)
●
The advantage of E.711 is that (unlike T.38) high speed faxes (in other words faxes with a
transmission rate > 14400 bps) can also use this higher transmission rate on a good net-
work, while high speed faxes must be slowed down to a speed of 14400 bps when T.38 is
used.
T.38
●
T.38 is an ITU standard that describes how two fax machines communicate over IP. This
standard refers to a real-time transmission of fax documents because the formats for trans-
mitting the signaling and user data between two gateways are described here.
The image data (T.4 or T.6 format) and control messages (T.30 format) are packed in spe-
cial T.38 messages and sent via the IP network. The packets are either used with TCP
(Transmission Control Protocol) or UDP (User Datagram Protocol).
At present HG 1500 V3.0 only permits transmission with UDP and not with TCP.
>
The advantage of T.38 is that it is more resistant to
packet loss and jitter in less than perfect network conditions. For more information, refer to
the service manual.
The functions were tested on the following devices:
– Siemens HF 2323
– Siemens Fax 790
– Canon Fax B155,
– Hewlett-Packard OfficeJet Model 635,
– OKI OKIFAX 4580,
– OKI OKIFAX 4550,
13-26
Nur für den internen Gebrauch
A31003-H3590-S100-7-7620, 06/2012
HiPath 3000/5000 V9, Service documentation