Sip Mlt - NEC UNIVERGE SV9100 Manual

2.5.1

SIP MLT

The SIP MLT (DT700/DT800) Series offers a line up of modular telephones. This modular design allows
the telephones to be upgraded and customized (except economy version) as required.
Optional LCD panels, keypads, handset cradles, face plates and coloured side panels can easily be
snapped on and off. See the tables for compatible kits.
SIP MLT extensions use an enhanced version of the SIP protocol (iSIP) developed by NEC to communicate
with the SV9100 system.
This allows the phones to use most of the features available on a normal (non-IP) keytelephone.
The phones cannot be used on any system other than the SV8000/SV9000 platforms.
The registration procedure for SIP MLT extensions is different to the SIP/H.323 Extensions, and is
described in the SIP MLT Extension Registration section below.
To run SIPMLT extensions the SV9100 must have:
GCD-CP10
GPZ-IPLE
SIP MLT License(s).
Providing Power
SIP MLT's require power to function. This can be provided in various ways: -
a) Local Power
The SIP MLT's have a connector for external power. This is supplied by an AC adapter that has a 27V
DC output. This means that a mains socket is required in the vicinity of each SIP MLT and loss of
mains power in the building will prevent the phones from working.
b) Powered Patch Panel (Midspan)
A powered patch panel has two RJ-45 connectors per SIP MLT. One port connects to the switch/hub,
and the other port connects to the SIP MLT. The patch panel has an integral power supply that adds
power to the spare pins of the RJ-45.
When the SIP MLT is connected to the powered patch panel, it automatically receives its power via the
spare pairs on the Cat-5 cable - there is no need for a local power adapter.
c) Power over Ethernet (PoE)
A PoE switch is a switched hub that also provides power over the spare pairs. The switch can be used
with any device (not just SIP MLT's) and will detect if power is required or not. As all of the phones
receive their power from one device, it is easy to protect the SIP MLT's from loss of power (by
connecting the PoE switch to a UPS).
There are two industry standards for PoE:
Cisco Inline Power – not supported by the DT800/DT700 range of SIP MLT's
IEEE802.3af – supported by the DT800/DT700 range of SIP MLT's
SIP MLT Extension registration
SIP MLT ports are allocated in blocks of 2.
For example
Insert a 16 port extension card (e.g. DLCA, LCA)
Other licenses may be required for extra features/functionality.
Part 2: VoIP Manual 69