10
SAPTF33xx-1xx
24-hour Technical Support:
1-800-260-1312
-- International:
00-1-952-941-7600
Operation
- Continued
Loop-Start Operation
Loop-Start Service -- commonly known as “Plain Old Telephone Service”
(POTS) -- is the primary analog signaling method used between telephone
switches such as the Central Office (CO) and a telephone device. Loop-Start
provides a way to indicate on-hook and off-hook conditions, which facilitates
outgoing and incoming calls in a voice network.
When a customer wants to make an
outgoing
call, he or she takes a telephone
device off-hook. This action completes the loop, which signals the CO that a
customer desires to use the telephone line. To signal the customer of an
incoming
call, the CO applies a ring voltage to alert the customer.
The three states of the Loop-Start signaling protocol are described below:
Idle State (On-Hook)
1.
The CO applies a battery voltage to the ring lead and monitors the
tip-ring current for closure of the tip-ring.
2.
The telephone device draws less than 10 µA of from the line while
waiting for the superimposition of the ringing voltage over the ring
lead.
Telephone In-Use (Off-Hook)
1.
The customer takes the telephone device off-hook, drawing a
minimum of 20 to 30 mA of current.
2.
The CO senses the tip-ring current and issues a dial tone on the line.
3.
Communication can now begin.
Central Office (CO) Rings the Telephone
1.
The CO superimposes the ringing voltage over the ring lead battery.
2.
The telephone device uses the ring voltage to operate the ringer,
which alerts the customer of an incoming telephone call.
3.
The customer takes the phone off-hook, which closes the tip-ring
connection and allows the tip-ring current to flow.
4.
The CO senses the DC current from the telephone device and
connects the call to the telephone line.
5.
Communication can now begin.
11
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Cable Specifications
The physical characteristics must meet or exceed FCC part 68 specifications.
Copper Cable
-- Category 1
Either shielded (STP) or unshielded (UTP) twisted-pair is acceptable.
Gauge:
24 to 22 AWG
Maximum # Nodes:
2
Maximum Cable Length:
5 meters (16.4 ft) (Unit A and CO)
5 km (3.1 mi) (Unit B and telephone)
Fiber Cable
Bit error rate:
≤
10-9
Single mode fiber (recommended):
9 µm
Multimode fiber (recommended):
62.5/125 µm
Multimode fiber (optional):
100/140, 85/140, 50/125 µm
SAPTF3311-100, SAPTF3311-110
1300 nm multimode
Fiber Optic Transmitter Power:
min: -19.0 dBm
max: -14.0 dBm
Fiber Optic Receiver Sensitivity:
min: -30.0 dBm
max: -14.0 dBm
Link Budget:
11.0 dB
SAPTF3313-100, SAPTF3313-110
1300 nm multimode
Fiber Optic Transmitter Power:
min: -19.0 dBm
max: -14.0 dBm
Fiber Optic Receiver Sensitivity:
min: -30.0 dBm
max: -14.0 dBm
Link Budget:
11.0 dB
SAPTF3314-100, SAPTF3314-110
1310 nm single mode
Fiber Optic Transmitter Power:
min: -15.0 dBm
max: -8.0 dBm
Fiber Optic Receiver Sensitivity:
min: -31.0 dBm
max: -8.0 dBm
Link Budget:
16.0 dB
SAPTF3315-100
1310 nm single mode
Fiber Optic Transmitter Power:
min: -27.0 dBm
max: -10.0 dBm
Fiber Optic Receiver Sensitivity:
min: -34.0 dBm
max: -14.0 dBm
Link Budget:
13.0 dB
SAPTF3315-110
1310 nm single mode
Fiber Optic Transmitter Power:
min: -8.0 dBm
max: -2.0 dBm
Fiber Optic Receiver Sensitivity:
min: -34.0 dBm
max: -7.0 dBm
Link Budget:
26.0 dB
SAPTF3329-100, SAPTF3329-110
SAPTF3329-101, SAPTF3329-111
1310 nm single mode
Fiber Optic Transmitter Power:
min: -13.0 dBm
max: -6.0 dBm
Fiber Optic Receiver Sensitivity:
min: -32.0 dBm
max: -3.0 dBm
Link Budget:
19.0 dB
SAPTF3329-102, SAPTF3329-112
SAPTF3329-103, SAPTF3329-113
1310 nm single mode
Fiber Optic Transmitter Power:
min: -8.0 dBm
max: -3.0 dBm
Fiber Optic Receiver Sensitivity:
min: -33.0 dBm
max: -3.0 dBm
Link Budget:
25.0 dB
The fiber optic transmitters on this device meets Class I Laser safety requirements
per IEC-825/CDRH standards and complies with 21 CFR1040.10 and
21CFR1040.11.
