 NTBA
NT1+2a/b
NT1+Multi
NT1
NT-Plus
NT-IP |
 | NT-IP provides full service NT1. The S0 bus includes emergency power, 6 kV protection level, and Remote maintenance facilities. Two analog ports and one RS-232 data port are included. NT-IP also features autobaud up to 230.4, and P&P installation for Windows® 95 and 98, 2000, Xp, NT4, Linux, and Macintosh®. It also offers Always On/Dynamic ISDN (AO-DI), along with Dial-out services. It complies with all current ETSI and ITU standards. USB to RS232 cable adapter available. |
The NT-IP is a network termination for the
ISDN basic rate access, which adds to the
features commonly found in a standard ISDN
network termination (NT1), two standard
telephone ports and an RS232 interface to
provide a fully digital, fast and reliable connection
to a PPP terminal server, such as
Internet Service Provider (ISP), remote
access, e-mail access server, etc.
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AO/DI
AO/DI, unlike standard ISDN, actually makes
three communications channels available to
the user. If, for example, both B-Channels are
bonded for a data session, and an incoming
call is received, one of the B-Channels is
automatically freed up for the telephone call.
If a fax call also comes in, the remaining BChannel
may be allocated to the fax call. The
data session continues on the D-Channel
until a B-Channel is available, if needed.
TELEPHONY SERVICES
When connecting to the ISDN over a NT-IP,
subscribers deploy ISDN basic telephony services
without any need to purchase additional
equipment (digital phones and/or terminal
adapters), and can keep using standard
devices, such as standard phone sets, cordless
phones, analogue modems, group 3 fax
machines, automatic answering machines,
analogue micro PBX’s etc.
The NT-IP also supports a range of supplementary
telephony services (call hold, call
waiting, 3-party conferencing, call forwarding,
etc.).
DIAL-UP DATA SERVICES
A fully digital data service is provided by the
NT-IP straight to the COM port of a PC with
unrivalled performance compared to analogue
modems, including sub-second call
setup times and a virtually error free data
channel to the service provider at a guaranteed
bit rate. No additional hardware or
software need to be installed to operate the
service.
NATIVE ISDN SERVICES
Additionally, subscribers connect native ISDN
terminals, such as videophony terminals, group
4 fax machines, etc., directly on the S-bus.
OPERATOR ADVANTAGES
Being an integrated access device, the NT-IP
offers the telecom operators simplified provisioning
and installation.
The NT-IP fully supports remote monitoring,
configuration, maintenance, and firmware
upgrade: operators can therefore offer their
customers a faster maintenance service at a
lower cost by limiting the number of on-site
interventions. |
STANDARD NT1
- 2-wire interface on the U reference point.
- 4-wire user bus on the S/T reference
point.
POTS INTERFACES
Electrical:
- PCM speech coder/decoder, according to
G.711, A-law.
- Pulse and/or tone dialling, metering
pulse generation.
- One port available in emergency conditions
(mains off).
- Local tone generation (dial tone, congestion
and call waiting) is provided when
required.
- Register recall or hook-flash keys are
also supported to invoke supplementary
services.
- To allow operation with a wide range of
terminal, the NT-IP features high onhook
battery voltage and high voltage
ringing even on heavy ringer loads (~3
REN’s).
Additional functions can be provided
according to customer specifications.
STANDARD SUPPLEMENTARY SERVICES FOR THE POTS INTERFACES
- The POTS ports of the NT-IP support the
Multiple Subscriber Numbers (MSN), the
Calling Line Identification Presentation
(CLIP), Connected Line Identification
Presentation (COLP) supplementary services.
ADDITIONAL SUPPLEMENTARY SERVICES
- The NT-IP supports supplementary services
based on stimulus procedures.
- Particularly, the following ETSI functional
protocol services are supported: Call
Hold (CH), Call Waiting (CW), Advice of
Charge (AOC), 3-Pty Conference (3-PTY),
Calling Line Identification Restriction
(CLIR) , Explicit Call Transfer (ECT) and
Malicious Call Identification (MCID).
AO/DI
AO/DI allows the user to maintain a continuos
connection without continuously tying
up a circuit. In its Dynamic ISDN aspect,
AO/DI allows the B-Channels, and thus the
circuit-switched network and connected
hardware, to be dynamically allocated to
end users only as actually needed. |
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