 NTBA
NT1+2a/b
NT1+Multi
NT1
NT-Plus
NT-IP |
 | NT1 Plus with a new hardware and software design guarantees higher component integration, lower failure rate, improved equipment reliability, and an Open platform for updating new services via local or remote software download. NT1 offers customized parameters (electrical features) that are software-managed, as well as easier customization and faster product delivery. It offers two analog ports and complies with all ETSI and ITU standards. |
 The NT1 Plus is a network termination
for the ISDN basic rate
access, which adds to the features
of a standard ISDN network
termination (NT1) a dual interface
to analogue terminals designed
for connection to POTS
(Plain Old Telephone System)
networks. These terminals include
standard phone sets, group
three fax machines, automatic
answering machines, data
modems, small Private Branch
Exchanges (PBX), Key Telephone
Systems (KTS), cordless and
DECT phones, etc.
The NT1 Plus therefore allows
network providers to overcome
a major obstacle to the diffusion
of ISDN in the Small Office And
Home Office (SOHO) and in the
residential markets: network
providers can offer a complete
ISDN service, aligned to current
regulations and, at the same
time, subscribers are not required
to purchase any additional
equipment, such as digital ISDN
phones and/or terminal adapters
to deploy basic telephony
services.
|
 A full ISDN service is to be provided to terminals connected to the So bus
NT1 Plus shall operate with all existing analogue equipment, and it shall support
supplementary telephony services (3-way conferencing, call diversion, call waiting, etc.)
Emergency operation is to be guaranteed to one POTS interface
Provision of convenient remote configuration, maintenance and diagnostics and the capability to remotely download the operating firmware
Support to both 2B1Q and 4B3T line code |
2-wire interface on the U reference point; three types of connectors are available: RJ11 or RJ45 or screw connector
4-wire user bus on the S/T reference point with impedance adaption
Emergency power supply to user terminals |
Pulse and/or tone dialling
25 Hz low distortion asymmetric ringing signal
PCM speech coder, according to G.711, A-law
Emergency power to one POTS interface |
Easy installation, operation and maintenance
Local or remote configuration through a standard DTMF phone
Local or remote maintenance, including configuration and diagnostics on the POTS and the U interface
Local and remote download of firmware upgrades
Support for stimulus and ETSI supplementary services |
The NT1 Plus has no batteries and is powered through an internal mains power supply or from the power supplied by the network over the line pair.
Power consumption from the network is limited to 1400 mW in the worst case (one POTS interface powered under emergency conditions). |
On the So interface the NT1 Plus provides the same quality of service as a standard NT1,
including:
full compliance to regulatory standards
up to 8 terminals allowed on the S bus
complete transparency to the test procedures from the exchange |
|
Multiple Subscriber Numbers (MSN)
Calling Line Identification Presentation (CLIP)
Connected Line Identification Presentation (COLP) |
|
| POTS interfaces support both pulse and DTMF dialling. Local tone generation (dial tone,
congestion and call waiting) is provided when required. Register recall and hook-flash
keys are also supported (e.g. to invoke supplementary services). |
Call Forwarding (Unconditional - CFU, On User Busy - CFB, No Reply - CFNR)
Call Completion on Busy Subscriber (CCBS)
Call Waiting (CW)
Malicious Call Identification (MCID)
Calling Line Identification Restriction (CLIR)
Line Identification Restriction (COLR)
3-Pty Conference (3PC)
Closed User Group (CUG)
Call Hold (CH)
Advice of Charge (AOC) |
|
Multiple Subscriber Numbers (MSN)
Calling Line Identification Presentation (CLIP)
Connected Line Identification Presentation (COLP) |
|
| Local and Remote installation and configuration
procedures are available through
a DTMF phone either connected to one of
the POTS interfaces or from a “secured”
ISDN access, through a normal telephone
or a PC connected to an Aethra TA1008
terminal adapter or an Aethra Front End. |
The front panel has a removable cover to
access switch settings for:
So bus configuration (short passive/extended)
emergency power (one of the POTS interfaces or the So bus)
terminating resistors for the So Bus |
|
The NT1 Plus provides a list of diagnostic
features:
download of firmware upgrades
remote diagnostics for POTS interfaces
- ringing voltage
- microphone current
- capacity measurement on
the POTS interfaces
- short circuit control
|
|
|
