General Product Description
Sopho 2000IPS
Release 12.2, August 2006
NEC Philips Unified Solutions
UPD
44 of 259
© NEC Philips Unified Solutions, 2006. All right reserved.
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2.9 Fax and modem traffic
2.9.1 T.30 Fax over IP (obsolete)
T.30 ITU-T standard FAX handshake protocol is supported to help facilitate FAX over a
much broader range of customer premise equipment. The facsimile transmission
procedure (T.30) is supported via T.30 FAX relay on the VCT package; PN-32IPLA-C
card and PN-16VCTA-A card must be used; Note since these cards are not RoHS
compliant and will be phased out, this feature will no longer be supported!
Facsimiles can be sent between SOPHO 2000 IPS and SOPHO IPS DM systems.
If a Super G3 facsimile is used, the transmission speed will be equivalent to G3.
Minimum network requirements such as available bandwidth, QoS, jitter buffer value
larger than network assumed value, and clock synchronization play an important factor
for successful G.711 FAX transmissions.
In some applications bandwidth is extremely limited making network problems virtually
impossible to avoid. For these applications T.30 FAX is recommended.
Required bandwidth for FAX Connection:
Connection Conditions
Required Bandwidth (One-way)
G711, Payload=40ms
150 Kbps (estimated)
T.30, G729a, Payload=40ms,
Communication speed=14.4Kbps
(No IP Header compression in Router)
23.6 Kbps (FAX Payload=78byte)
T.30, G729a, Payload=40ms,
Communication speed=14.4Kbps
(with IP Header compression in Router)
16.6 Kbps (FAX Payload=78byte)
2.9.2 FAX Communication with IP PAD cards (Release 9):
Fax over IP (FoIP) is now available in G.711 non-compressed or G.726 compression
mode.
PN-8IPLA IP-PAD-C supports G.711 and G.726 Pass-Through FAX communication
When providing the G.711 pass-through FAX communication with the PN-32IPLA-A
card, following condition is required.
-
PN-32IPLA IP PAD-E is mounted.
OR
-
PN-32IPLA IP PAD-D and PN-16VCTAA IP PAD-B are mounted.
(When mounting two 16VCT cards, both should be PN-16VCTAA IP PAD-B.)
When providing the G.726 pass-through FAX communication with the PN-32IPLA-A
card, following condition is required.
PN-32IPLA IP PAD-E and the PN-16VCTAA IP PAD-B are mounted.
(When mounting two 16VCT cards, both should be PN-16VCTAA IP PAD-B.)
8IPLA does not support T.30 FAX. (T.30 FAX requires the 32IPLA-A)
