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RC3000-15 (P100R001) Hardware Description
Table 8-16 Parameters of the interface on the 16E&M/8E&M/4E&M card
Coding scheme
Bit rate
Audio port impedance
Effective transmission
bandwidth
Gain frequency features
Frequency distortion
Total distortion (1020
Hz)
Gain change according
to level
Degree of unbalance
about earth
Idle channel noise
Feed voltage (off-hook)
Feed current
Ringing voltage
Return loss
Parameter
A-law
64 kbit/s
On-hook impedance is 2 MΩ.
Off-hook loopback impedance is 600+200//0.1.
300–3400 Hz/600 Ω
The Rx (A/D) gain ranges from -3 to 27 dB. The default value
is controlled by the internal jumper. Its step is 0.1 dB.
The Tx (D/A) gain ranges from -13 to 7 dB. The default value
is controlled by the internal jumper. Its step is 0.1 dB.
300–3000 Hz; < 0.5 dB
3000–3400 Hz; < 3.0 dB
0 to -30 dBm0; < 33 dB
-30 to -40 dBm0; < (33–22) dB
-40 to -45 dBm0; < 22 dB
+3 to -40 dBm0; ∆ < 0.5 dB
-40 to -50 dBm0; ∆ < 1.0 dB
-50 to -55 dBm0; ∆ < 3.0 dB
300–600 Hz: > 40 dB
600–2400 Hz: > 46 dB
2400–3400 Hz: > 41 dB
< -67 dBm0p
Typical -48 V
Typical 20 mA
Typical 60 V/30 Hz
300–600 Hz: > 12 dB
600–3400 Hz: > 15 dB
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Description
8 Voice cards
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