Digital Loop Carrier System
Product ID: TDC120A
TDC120A is designed for "Non-Concentration Solution" especially for low capacity requirement in some far & small area.
- Transmission interface:
- Carrier mode: Per CCITT G.703, G.713 pulse code modulation(PCM)
- Sampling frequency: 8000/s
- Bits per channel: 8 bits
- E1 interface:
- Line code format: HDB3
- Impedance: 75 (unbalanced) or 120 Ohms(balanced)
- Data rate: 2.048 Mb/s 50ppm
- Capacity:
- Subscriber lines: 240
- Trunk lines: 120
- Trunks: 4 x 2.048 Mbit/s
- System characteristics:
- Max. concurrent ringing phone: total 60
- Max. Loop resistance(remote terminal): 1800 ohms (including telephone set resistance)
- Loop current(Remote terminal): At least 20 mA(including telephone set), under 1200 Ohms loop resistance condition
- Exchange interface: Analog 2W, V5.1(to be available in the near future)
- Services: POTS, Pay-Phone (12K/16KHz, polarity reversal), 2W/4W E&M, 64K data port, basic rate ISDN
- Maintenance & Provisioning:
- S/w requirement, Self test button and indication, local or remote OAM&P (for both, exchange and customer sides): Windows 3.x/486 system, 4MB memory & 15 MB free space of HDD
- Power requirement:
- Central office terminal power: input voltage(DC):-40~-60VDC, -48VDC nominal; input current, full system, Non/60/120 active subscribers: 0.3 amp/0.6amp/1.0amp
- Remote terminal power: input voltage(DC): -40~-60VDC, -52.5VDC standard; input voltage(AC): 110/220V, 60/50Hz; input current, full system, Non/60/120: 1.0/2.6/4.5 amp at -52.5v; Active subscribers; battery voltage: -52.5V
- Installation:
- Central Office terminal( 240 subscribers): 354 x 438 x 313mm(h x w x d)
- Remote terminal (240 subscribers): 1173 x 438 x 313mm(h x w x d), including charger, battery, switch board and ring unit
- Indoor 19-inch rack, outdoor weather-proof cabinet: 6 feet 6 inch(1981mm) or 9 feet (2743mm) high (optional)
- Operating environment:
- Central office terminal: (in service) 0 degree ~ +40 degree 80%RH; (in storage) -10 degree ~ 60 degree 90%RH
- Remote terminal: (in service) -10 degree ~ +60 degree 95% RH; (in storage) -10 degree ~ +70 degree 95%RH
- TDC120A series product/follow same specification as TDC240A
- Non-Concentration solution with maximum 120 line capacity (4 E1 trunk)
- Three common unit request only
- Communal subscriber inter faces designing with TDC240A
- Flexible E1 or E2 trunk interface support
- Low cost, minimize physic space occupation
- Digital: High quality of voice/data transmission
- Flexible: Range of line cards solution
- Reliable: low card count, custom ASIC design
- Simple: Easy to set up and install
- Intelligent: Processor controlled, craft GUI interface network managing software control
- Low Power: Remote and central exchange
- Concentration: Uses less transmission capacity to expand the ratio from 1:2 to 1:8 via 4 E1 trunk
- Six lines per card: Low incremental cost per subscriber, fit capacity to needs exactly and fault only affects limited party
- Common cards: low count identical cards used in RT and COT, minimum spare parts needed
- Plug-in software: COT and RT software is plug-in for one system provision, common CPU hardware sequentially
- Self-configuring: No complicated start up needed
- Protection switch: Optional power and ring generator unit protection
Main Products:
e1 / t1 digital loop carrier system ( DLC), digital pair gain system, HDSL, subscriber line concentrator, digital multiplexer, OLTE, optical fiber cable, etc.