Avaya 1692 IP - Manual (Page 28)

Chapter 5: Safety Notices
28 1692 IP Conference Phone User’s Guide Nov 2009
Safety and Compliance (continued)
Industry Canada (IC)
This Class [B] digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe [B] est conforme à la norme NMB-003 du Canada.
CE and VCCI Mark
This Avaya 1692 IP Conference Phone is marked with the CE mark. This mark indicates
compliance with EC Directives 2006/95/ED and 2004/108/EC. A full copy of the Declaration of
Conformity can be obtained from Polycom Ltd., 270 Bath Road, Slough, Berkshire, SL1 4DX,
UK.
WARNING Electrical Safety
To avoid electric shock, do not connect safety extra low voltage (SELV) circuits to
teleconference station network (TNV) circuits. LAN ports contain SELV circuit, and WAN ports
contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution
when connecting cables.
This product is rated 48Vdc, 0.375A. When used with the optional external power supply, the
power supply shall be a Listed power supply with a LPS output, rated 48V, min. 0.375A.
New Zealand Telepermit
PTC General Warning
The grant of a Telepermit for any item of terminal equipment indicates only that Telecom has
accepted that the item complies with minimum conditions for connection to its network. It
indicates no endorsement of the product by Telecom, nor does it provide any sort of warranty.
Above all, it provides no assurance that any item will work correctly in all respects with another
item of Telepermitted equipment of a different make or model, nor does it imply that any
product is compatible with all of Telecom’s network services.
The Use of IP Networks through the PSTN
Internet Protocol (IP) by its nature introduces delay into speech signals as each data packet is
formulated and addressed. Telecom Access Standards recommends that suppliers, designers
and installers using this technology for calls to or from the PSTN refer to ITU E Model
requirements in the design of their networks. The overall aim is to minimize delay, distortion
and other transmission impairments, particularly for those calls involving cellular and
international networks, which already suffer extensive delay.
The Use of Voice Compression through the PSTN
Because of the extensive delay already experienced when calling cellular and international
networks, some of which is already caused by their use of voice compression technologies.
Telecom Access Standards will only approve G711 voice technology for use on the PSTN.
G711 is an ‘Instantaneous Speech encoding Technique’ whereas G729 and all its variants are
considered ‘Near Instantaneous’ introducing additional delay into the speech signal.