VCL-30, Technical
Specifications
The VCL-30,
2Mbps - 30 Channel E1, Drop-Insert Multiplexer provides full range of
POTS (voice) and digital data services to subscribers located at
different locations, requiring to interconnect and establish a voice and
data network over an E1 link. |
 |
| The
VCL-30 is a simple, yet powerful E1 Channel Bank for connecting
and integrating analog communication equipment with digital E1 services. |
User Configurable Interface Card
Voice Interfaces
- POTS service from a Central Office Switch. (FXO & FXS)
- Hot Line (FXS-FXS).
- 2 Wire and 4 Wire, E&M applications.
- 30W, sine wave, 86VRMS Ringer.
|
Data Interfaces
- V.35 (64Kbps Synchronous Data) - 2 Interfaces (Dual Port) per
card.
- N x 64 ("N" x 64Kbps Synchronous Data - One
Interface per card).
- G.703 (64Kbps Synchronous Data) - 2 Interfaces (Dual Port) per
card.
- V.24 (up to 19.2Kbps Synchronous /Asynchronous Data) 2
Interfaces (Dual Port) per card.
- BRI ISDN “U” Interface
- iDSL (ISDN DSL) leased line interface
- 10BaseT Ethernet
|
Mechanical Specification
Rack
Mounting |
Standard 19
Inch. DIN Rack |
Height
|
133.33mm. |
Depth |
292mm. |
Width |
482mm. |
Weight
|
7.50 Kg. |
System
Composition
- Control Card 1
- Control Card 2
- Power Supply Card
- Backplane
- 19-Inch Shelf
Slot 1
|
Power Supply
Card |
Slot 2
|
Ringer Card |
Slot 3
to 17 |
Voice/Data
Interface Cards |
Slot
18 |
Control Card 1 |
Slot
19 |
Control Card 2 |
Technical Specifications
| 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
|
120W balanced / 75W unbalanced |
Peak Voltage of a mark
For 120W
Balanced interface
75W
Unbalanced interface
|
3.0 V ± 0.3 V
2.37 V ± 0.237 V |
Peak Voltage of a space
for 120W
Balanced interface
75W
Unbalanced interface
|
0 V ± 0.3 V
0V ± 0.237 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 multi-frame
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 |
600W (900W optional) |
| Voice Channel Frequency |
300Hz-3400Hz |
| Insertion Loss
|
-2.0dB Nominal (User adjustable in steps of 0.5
dB
through Network Management Software |
| 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 40 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 |
| Periodic Metering |
16 Khz (Optional) |
| Dial Pulse Speed |
8 -12 pps |
G.703 @ 64kbps, Synchronous Data Interface
| 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 |
High Speed Synchronous Data Interface V.35
| Number of Interfaces per Card
|
2 |
| Maximum Number
|
30, V.35, 64 Kbits / sec. Interface |
| Conformity
|
To (CCITT) Rec. V.35 |
| Mode
|
Synchronous |
| Bit Rate |
64 kbps |
| User Interface |
DCE or DTE - User Configurable |
High Speed Synchronous Data Interface "N X
64"
| Number of Interfaces
per Card |
1, (”N” x
64KBits/sec. per Card) |
| Maximum
Number |
(”N” x 64
Kbits / sec. Interface maximum value of “N” = 16) |
| Conformity
|
To (CCITT) Rec. V.35 |
| Mode
|
Synchronous |
| Bit
Rate |
64 Kbps to 1024Kbps |
| User Interface |
DCE or DTE - User
Configurable |
Low Speed Data Interface V.24
| Number of Interfaces Per Card
|
2 |
| Maximum Number
|
30 |
| Conformity
|
To (CCITT)
Rec. V.24 |
| Mode
|
Synchronous/Asynchronous |
| Bit Rate
|
2.4/4.8/7.2/9.6/ 19.2
Kbps |
| User Interface |
DCE or DTE - User
Configurable |
BASIC RATE ISDN Specifications
The BRI ISDN Access Module of the VCL-30, 2Mbps Drop-Insert
Multiplexer shall terminate at either end on a "U" Interface - both on the
Exchange Side / CO Side (in a NT Mode) and the Customer Side (in a LT Mode) and shall be
used to deliver BRI ISDN (2B+D) from the Switch to the Customer Premises on the E1 link
along with other voice and data services.
The BRI ISDN "U" Interface shall have the following specifications:
| "U" Interface
|
Meets ANSI T1.601-1992 requirements |
| Line Rate
|
160 Kbits/s |
| Frame Format |
As per 2B+D of CCITT Rec. I 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 |
| CO Side "U" Interface
|
NT Emulation |
| Customer Side "U" Interface |
LT Emulation |
| Impedance
|
135 Ohms at 40KHz |
iDSL - ISDN DSL Specifications
| "U" Interface
|
Meets ANSI T1.601-1992 requirements |
| Line Rate
|
160 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 |
Customer Premises
Desktop User Interfaces
Customer Premises Desktop Interfaces - Option # 1:
(V.35 interface @ 128Kbps)
| Our CO / ISP side iDSL Modem
cards - part # VCL-30-080 may be used with our V.35, baseband modem - Part #
VCL-30-090 (customer premises desk top equipment with V.35 Interface @ 128Kbps). |
| Customer Side / Remote / Side Desk-Top
Equipment: Provides 128Kbps data transmission rate on a twisted pair upto 5KM from the
VCL-30, Installation Site: Customer Interface - V.35 data interface @ 128Kbps |
| Power Supply 110VAC-220VAC,
50Hz/60Hz, UL and CE Approved. |
| Ordering Information: Part # VCL-30-090
(desk-top customer premises equipment with V.35 interface @ 128Kbps). |
Optional Accessories:
V.35 Data Interface Cable (with male / female M34 connector) |
Customer Premises Desktop Interfaces - Option # 2:
(10BaseT Ethernet - with IP Protocol Routing Functionality)
| Our CO / ISP side iDSL Modem
cards - part # VCL-30-080 may be used with our customer premises equipment with a 10BaseT
Interface. Part # VCL-30-095 - customer premises desk top equipment with 10BaseT
Interface - IP Protocol Routing Functionality. (Firewall Protection - Optional). |
| Customer Side / Remote / Side Desk-Top
Equipment: Provides 128Kbps data transmission rate on a twisted pair upto 5KM from the
VCL-30, Installation Site: Customer Interface - 10BaseT Ethernet Interface with IP
Protocol Routing Functionality. The 10BaseT Interface may be directly connected to a
10BaseT Network Interface Card installed on a PC, or to to a HUB to connect a complete
customer LAN to the network. |
| Power Supply 110VAC-220VAC,
50Hz/60Hz, UL and CE Approved. |
| Ordering Information: Part # VCL-30-095
(desk-top customer premises equipment with 10BaseT interface). |
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 |
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 Synchronization
| Synchronization
Sources |
Internal Clock,
External Clock, timing derive
from incoming HDB3 links (Loop Timed) |
| External Clock Input
|
As per ITU (CCITT)
Rec. G.703 |
Impedance of External
Clock Input Port
|
120W balanced |
| Default
Option |
Internal Clock |
Environmental
| Exchange Terminal |
0°C to + 50°C, 90% R.H. (Non Condensing) |
| Subscriber Terminal |
-10°C to +60°C, 90% R.H. (Non Condensing) |
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 |
4A at +5V, 0.5A at -5V |
| Input Voltage Reversal Protection |
Provided in the Card |
| Over Current Protection |
6A for +5V, 0.5A for -5V |
| Short Circuit Protection |
Current limit - 6A. Recovers on removal of short |
| Under Voltage |
< 4.5V |
| Over Voltage |
5.4V to 5.6V |
| Efficiency at full load
|
>70% |
| Ripple at full load
|
<5mVrms |
| Spike at full load |
<50mV |
| Power Consumption |
21W - with all 30 Voice Circuits
42W (Worst - Case) - all data circuits. |
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Technical specifications are subject to change without
notice.
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