VCL-MX,
Version 1
E1
Drop Insert Multiplexer
Technical Specifications
E1 Interface
(Main Link)
| Number of Interfaces |
2 |
| Conformity
(Electrical) |
G.703 |
| Frame Structure |
As per ITU (CCITT)
G.704 |
| Signaling |
Channel Associated
Signaling |
| PCM Sampling Rate |
8000 Samples / sec |
| Encoding
Law |
A Law as per ITU
(CCITT) |
| Bit Rate |
2048 Kbps ± 50 ppm |
| Code |
HDB3 |
| Nominal Impedance |
120 W balanced / 75 W unbalanced (75 W
option) |
Peak Voltage of a mark
For 120 W Balanced interface
75 W Unbalanced interface |
3.0 V ± 0.3 V
2.37 V ± 0.237 V |
Peak Voltage of a
space
for 120 W Balanced interface
75 W Unbalanced interface |
0V ± 0.237 V
0 V ± 0.3 V |
| Nominal Pulse Width |
244 ns |
| Pulse Mask |
as per ITU (CCITT)
Rec. G.703 |
| Output Jitter |
< 0.05 UI (in the
frequency range of 20Hz to 100 KHz) |
| Permissible
Attenuation |
6 dB at 1 MHz |
Return Loss at:
51.2 KHz to 102.4 Khz
102.4 KHz to 2048KHz
2048KHz to 3072 Khz |
> 12dB
> 18dB
> 14dB |
| Jitter Tolerance |
As per ITU (CCITT)
G.823 |
| Loss
and recovery of frame alignment |
As per clause 3 of ITU
(CCITT) G.732 |
| Loss and recovery of
multiframe alignment |
As per clause 5.2 of
ITU (CCITT) G.732 |
2 Wire / 4 Wire
- Voice Frequency Interface(s)
| Number of
Channels per Card |
2 |
| Interface
Type |
FXO, FXS,
2W / 4W E&M |
| Maximum
Number of Channels |
30 |
| Transmission
performance |
Fully
Compliant to ITU (CCITT) G.712 specification |
| Line
Impedance
|
600 W (900 W optional) |
| Voice
Channel Frequency |
300Hz-3400Hz |
| Insertion
Loss |
-2.0dB
Nominal (User adjustable) |
| Idle
Channel Noise |
£-65dB |
| Return
Loss |
300Hz -
600Hz - ³12dB
600Hz - 3400Hz - ³15dB |
| Longitudinal
Balance |
³ 46dB between 300Hz to 3400Hz |
| Ring
Frequency |
25 Hz
(20Hz, Optional) |
| Ring
Voltage |
³ 75 volts RMS into a load of 5 R.E.N. with a 0.30 Erlang traffic pattern |
| Subscriber
Loop Current |
³ 23mA into a subscriber loop of 1000 ohms |
| Overload
Level |
+3.14dBm
± 0.5dBm |
| Battery
Reversal |
All
channels |
| Dial Pulse
Speed |
8 -12 pps
- Pulse Dialing / DTMF Dialing |
Low Speed Data Interface
RS232
| Interface |
RS232 |
| Number of Interfaces
per Card |
2 |
| Maximum Number |
30 |
| Conformity |
RS232 |
| Mode |
Asynchronous |
| Bit Rate |
50 bps to 19.2 Kbps |
| User Interface |
DCE |
| Character Length |
5 / 6 / 7 / 8
(Auto-Select) |
| Stop Bits |
1 / 1.5 / 2
(Auto-Select) |
| Parity |
Even / Odd / 0’s
/ 1’s / none (Auto-Select) |
G.703 @ 64kbps,
Synchronous Data Interface
| Interface |
G.703@ 64 Kbps |
| Number of Interfaces per Card |
2 |
| Maximum Number |
30, V.35, 64Kbits / sec. Interface |
| Conformity |
To (CCITT) Rec. G.703 |
| Mode |
Synchronous, Co-directional |
| Bit
Rate |
64Kbps |
Sub-Rate
Multiplexer:- Optional Extra
| Number of Interfaces per 64 Kbps
channel |
6 |
| Interface |
RS232 |
| Mode |
Asynchronous |
| Bit
Rate |
9.6Kbps, 8 bits 1 stop bit |
| Parity |
None |
BRI ISDN 2B+D
| "U" Interface |
Meets ANSI T1.601-1992 requirements |
| Line Rate |
128 Kbits/s |
| Frame Format |
2B+D as per CCITT Rec. 1.430 |
| Line Code |
2B1Q as per CCITT Rec.G.961 |
| Accepted Line Attenuation |
42dB at 40 Khz |
| Pulse Shape |
As per CCITT Rec.G.961 |
| Multiplexer Emulation |
LT Emulation / NT Emulation (User Selectable) |
| Impedance |
135 Ohms at 40KHz |
iDSL - ISDN DSL
Specifications
| "U" Interface
|
Meets ANSI T1.601-1992 requirements |
| Line Rate
|
128 Kbits/s |
| Frame Format |
2B as per CCITT Rec.1.430 |
| Line Code
|
2B1Q as per CCITT Rec.G.961 |
| Accepted Line Attenuation |
42dB at 40 Khz |
| Pulse Shape |
As per CCITT Rec.G.961 |
| Multiplexer Emulation |
LT Emulation |
| Customer Premises Equipment |
NT Emulation |
| Impedance |
135 Ohms at 40KHz |
Maximum Distance : 5KM (4 miles) on 0.5 mm twisted Pan.
Distance may vary with cable gauge
For distance using various cable gauges please refer to chart below.
| Distance in
Kms. (Miles) |
Data Rate
(Kbps) |
Wire Gauge
(AWG/mm) |
| 19 (.9mm) |
22 (.6mm) |
24 (.5mm) |
26 (.4mm) |
128 / 144 |
17.4 (10.8) |
11.6 (7.2) |
8.1 (5.0) |
5.5 (3.4) |
Protection
Central Office Terminal and Remote Terminal are protected
against power surges and transients occurring from lightning and electric induction as per
CCITT Rec. Table I/K-20 towards line side.
Clock
| Timing Options |
Internal Clock, Loop
Timed Clock |
| Synchronization
Sources |
Internal Clock,
External Clock, timing derive
from incoming HDB3 links (Loop Timed) |
| Default
Option |
Internal Clock |
Management
Interface
Local Management Interface
RS232, operating @ 9.6 Kbps CLI (text) based Interface, Hyper Terminal (VT-100 Emulation).
In-band Management Interface for Remote Terminals
RS232, operating @ 9.6 Kbps CLI (text) based Interface, Hyper Terminal (VT-100 Emulation).
Out-of-Band Management Interface - Optional
10 / 100 BaseT - User Assigned IP Address
Environmental
| Temperature and Humidity |
0°C to + 50°C, 90% R.H. (Non Condensing) |
| Altitude |
upto 9,000 feet |
Power Supply
| Input DC voltage |
-48V DC ( nominal ) |
| Range of input |
-40V to -60V DC |
| Output voltage |
+5V, -5V, filtered -48V ( for term. cards) |
| Full Load Output Current |
8A at +5V, 0.5A at -5V |
| Input Voltage Reversal Protection |
Provided in the Card |
| Over Current Protection |
10A for +5V, 0.5A for -5V |
| Short Circuit Protection |
Current limit - 6A. Recovers on removal of short |
| Efficiency at full load
|
>86% |
| Ripple at full load
|
<5mVrms |
| Spike at full load |
<50mV |
| Power Consumption |
21W - with all 30 Voice Circuits
50W (Worst - Case) - all data circuits. |
Related Links:
Others Links
Technical specifications are subject to
change without notice.
All brand names and trademarks are the property of their respective
owners. |
