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VCL-EC128-T1,
Voice Echo Canceller is a fully integrated 24-channel echo canceller that cancels echo of
up to 128ms. Each of the 24 channels cancels echoes up to 128ms with disable tone
detection and meets ITU-T G.165 and ITU-T G.168 requirements for echo
cancellation. T1 Inputs and T1 Outputs are balanced 100 Ohms, RJ-45.
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T1, VCL-EC128, Voice Echo Canceller - Technical Specifications
| Provides voice echo
cancellation of up to 64ms / 128ms, User Selectable |
| Meets ITU-T G.164 and G.165
and G.168 recommendations. |
| Non-Linear Processor with
Comfort Noise Insertion |
| Redundant Power Supply
(Optional) |
| T1 Circuit by-pass in the
event of power supply failure. |
| Fully integrated
independent 24-channel voice echo canceller |
| Supports Signaling: 23B+D
PRI ISDN (Euro ISDN) , C7, D4 Robbed-Bit, SLC-96 - User Selectable |
T1 Interface at 1544
Kbps
| Number of
Interfaces
|
2,
1 - Input (RJ-45)
1 - Output (RJ-45) |
| Conformity
|
G.703 |
| Framing
Options
|
D4, ESF
(Selectable) |
| Signaling
|
24B (24
voice channels) with out-of-band signaling (C7, SS7 etc.) or 23B+D, PRI ISDN (23 voice
channels + D signaling channel) |
| PCM
Sampling Rate
|
8000
Samples / sec |
| Encoding
Law
|
µ Law as
per ITU (CCITT) G.711
8 bit
PCM encoding
|
| Bit Rate
|
1544 Kbps
± 130 ppm |
| Code
|
B8ZS, AMI
(Selectable) |
| Nominal
Impedance
|
100 W balanced |
| Pulse Mask
|
As per ITU
(CCITT) Rec. G.703 |
| 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 |
NMS (with Telnet)
xPort Specifications
|
Network Interface |
RJ-45 Ethernet 10BaseT or 100BaseT-TX (auto sensing) |
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Compatibility |
Ethernet Version 2.0 IEEE802.3 |
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Protocols Supported |
ARP, UDP/IP,
TCP/IP, Telnet, ICMP, SNMP, DHCP,
BOOTP, TFTP,
Auto IP, SMTP and HTTP |
|
LEDs |
10Base-T &
100Base-TX Activity, Full/half duplex. |
|
Management |
Internal web
server, SNMP (read only), Serial login, Telnet login |
| EMI
Compliance |
Radiated &
conducted emissions - complies with Class B limits of EN 55022:1998
Direct &
Indirect ESD - complies with EN55024:1998
RF
Electromagnetic Field Immunity - complies with EN55024:1998
Electrical
Fast Transient/Burst Immunity - complies with EN55024:1998
Power
Frequency Magnetic Field Immunity - complies with EN55024:1998
RF Common Mode
Conducted Susceptibility - complies with EN55024:1998 |
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