Carlson Wireless USA revision 1.05 Page 12
SPECIFICATIONS
BASEBAND PERFORMANCE
Voice Coding Uncompressed 64 kb/s PCM
Signaling DTMF is passed through
Modem Support up to V.34-1996, (33.6 kb/s)
Fax Support up to G4, unrestricted
Digital Interface Asynchronous, RS-232, DCE
Idle Channel Noise -68 dBm max (20 dBrnCo)
End-to-End System Latency 5 ms typical
NETWORK INTERFACE SPECIFICATIONS - FXO or Central Office
Line Impedance 900 Ohm +2.16 uF, loop start
Maximum Loop Length 1500 Ohms
Ring Equivalent Number 0.5B
Ring Detect 40-110 Vrms, 17-34 Hz
2 Wire Return Loss (ERL) Greater than 20 dB
NETWORK INTERFACE SPECIFICATIONS - FXS or Subscriber
Line Impedance 600 Ohm, loop start
Loop Current 27 mA fixed
Maximum Loop Length 600 Ohms
Ringing Voltage 86 Vrms Modified Square Wave
Ringing Frequency 20 Hz standard., 16, 25 Hz opt
Ringing Load 5 REN-B max (5 Watts)
2 Wire Return Loss (ERL) Greater than 20 dB
Carlson Wireless USA revision 1.05 Page 9
(3) Lightning protection.
Grounding of the drain wire: For feed cable runs of
less than 35 feet (10m) and not located in a highly active lightning area, con-
necting the bare drain wire to a copper clad ground rod driven at least 6 feet
(2m) into moist earth with a short copper #8 AWG wire at the point of the ter-
minal block may suffice. The antenna mast must also be grounded in the
same fashion by a separate grounding rod. However if the run is longer than
35 feet or the location is in a highly active lightning area then a standard 3
way gas tube protector must be added. Connecting information on this device
is provided by it’s manufacturer.
(2) Connecting the feed cable to the inside equipment.
Inside the building the feed cable is brought out to a terminal block consisting
of 4 pairs of screw down connections. The following diagram shows how to
wire the connectors.
