FXS, Voice Frequency Interface: (Part No. VCL-MX-1525-16-5.0)
Maximum number of interface cards 9
Number of channels per card 16
Interface type
FXS,
A-law, 8 bit/sample, A=87.6 / 87.7, 13 segment coding
(In a single chassis)
144
Transmission performance Fully compliant to ITU (CCITT) G.712 specification
Line impedance
600 Ω (900 Ω optional)
Voice channel frequency 300Hz-3400Hz
Insertion loss / gain
-2.0 dB Nominal (user adjustable)
Adjustable range –30 dB to +3 dB in steps of 0.5dB
User selectable range for gain /
insertion loss
0 dB to 18 dB
Idle channel noise
≤ - 65 dB
Return loss
300Hz – 600Hz - ≥ 12 dB
600Hz – 3400Hz - ≥ 15 dB
Longitudinal balance ≥ 46 dB between 300Hz to 3400Hz
Ring frequency 16 Hz, 20 Hz, 25 Hz, 50 Hz
Ring voltage
≥ 75 volts RMS into a load of 5 R.E.N. with a 0.30 Erlang
traffic pattern
Subscriber loop current ≥ 30mA into a subscriber loop of 1200 Ohms
Overload level +3.14 dBm ± 0.5 dBm
Battery reversal All channels
Dial pulse speed 50 pps – Pulse Dialing ≤ ± 2 ms / DTMF Dialing
Protection As per ITU-T Rec. K.20
FXO, Voice Frequency Interface: (Part No. VCL-MX-1530-16-5.0)
Maximum number of interface cards 9
Number of channels per card 16
Interface type
FXO
A-law, 8 bit/sample, A=87.6 / 87.7, 13 segment coding
(In a single chassis)
144
Transmission performance Fully compliant to ITU (CCITT) G.712 specification
Line impedance
600Ω (900Ω optional)
Voice channel frequency 300Hz-3400Hz
Insertion Loss / Gain
-2.0 dB Nominal (user adjustable)
Adjustable range –30 dB to +3 dB in steps of 0.5 dB
User selectable range for gain /
insertion loss
0 dB to 18 dB
Idle Channel Noise
≤ -65dB
Return loss
300Hz – 600Hz - ≥ 12 dB
600Hz – 3400Hz - ≥ 15 dB
Longitudinal balance ≥ 46 dB between 300Hz to 3400Hz
Overload Level +3.14 dBm ± 0.5 dBm
Battery reversal All channels
Dial pulse speed 50 pps – Pulse Dialing ≤ ± 2 ms / DTMF Dialing
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