Cisco VG204XM データシート

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Category

Cisco VG350

Cisco VG224

Cisco VG204XM and VG202XM

FXS loop resistance

Up to 600 ohms (including phone or
terminal equipment) for short-loop-
length port

Up to 1400 ohms (including phone
and terminal equipment) for long-
loop-length port

Up to 600 ohms (including the phone
or terminal equipment)

Up to 600 ohms (including the
phone or terminal equipment)

Direct inward dialing (DID)
loop resistance

Up to 1800 ohms (including terminal
equipment)

On-hook voltage

-44V

-43 V

Off-hook loop current

25 mA (maximum) for short-loop-
length port

35 mA (maximum) for long-loop-
length port

25 mA (maximum)

Ring tone

Configurable for different country
requirements

Ring voltage

54 Vrms into 5 ringer equivalence
numbers (RENs) at zero-loop-length
port (balanced) (short-loop-length
port)

62 Vrms into 2 RENs at zero-loop-
length port (balanced) (long-loop-
length port)

50 Vrms into 5 RENs at zero-loop-
length port (balanced) if no DC offset

54 Vrms into 5 RENs at zero-loop-
length port (balanced) if no DC
offset

Ring frequency

20, 25, 30, and 50 Hz

Ring waveform

Sine wave if no DC offset

20 and 24 VDC offset trapezoidal

Sine wave up to 35-VDC offset

Ring load

5REN with no DC offset

2REN with DC offset

5 RENs with no DC offset

2 RENs with DC offset

REN loading

5 REN per port (short-loop-length
port)

2 RENs per port (long-loop-length
port)

(maximum 40 total RENs loads per
each SM-D-72FXS module;
maximum 30 total RENs loads per
each SM-D-48FXS-E module)

5 RENs per port, 12 RENs per
system (maximum)

RJ-11 FXS port terminating
impedance option

600c, 600r, 900c, 900r, complex1,
complex2, complex3, complex4,
complex5, and complex6

600-ohm complex, 600-ohm real,
900-ohm complex, 900-ohm real,
complex1, and complex2

Disconnect supervision

Power denial (calling party control
and far-end disconnect)

Caller ID

On-hook transmission of frequency-
shift-keying (FSK) data

On-hook transmission of FSK data

FXS loop Length

Short-loop-length port 3000 ft, 26
AWG 5500 ft, and 24 AWG

Long-loop-length port 11,000 ft,
26AWG 18,000 ft, and 24 AWG

3000 ft, 26 AWG

Category cable

Category 3 and Category 5

Physical connector

RJ-21 and RJ-11

RJ-21

RJ-11

Number of connectors or
ports

160 (144 using two SM-D-72FXS
modules with RJ-21 connectors and
16 using FXS voice interface card
(VIC) modules with RJ-11
connectors)

24 FXS ports

2 FXS ports on VG202XM

4 FXS ports on VG204XM

Mean time between failures
(MTBF)

1,390,019 hours

195,671 hours

200,000 hours