The P-Gain 2/4 Digital Pair Gain System installed between the central office and subscribers that uses advanced ISDN technology to double/ quadruple the capacity of existing copper plant without laying new wires. By using digital signal processing and ADPCM voice compression technology, P-Gain 2/4 uses telephone lines more efficiently than conventional equipment does. P-Gain 2/4's noise immunity function is also superior to that of traditional analog equipment. P-Gain 2/4 combines ISDN U-interface transmission, Adaptive Echo Cancellation, and voice compression technology to provide an immediate low-cost solution to a shortage of subscriber lines. Furthermore, P-Gain supports add-on features like "Automatic Number Identification (ANI)", "Alarm modes" and maintenance in "Network Management System (NMS)".
Specifications
- Digital subscriber line:
- Line code: 2 BIQ complies with ANSI T1.601-1991
- Maximum Line resistance: 1300 ohms
- Line impedance: 135 ohms +/- 10%
- Line loss: 42dB@40KHz
- Voice transmission:
- Voice Encoding: PCM (mu)-Law/A-Law optional complies with CCITT Rec. G711
- Compression: ADPCM complies with CCITT Rec. G721 (0+4 only)
- RT impedance: 600 ohms
- Insertion loss: 3 +/- 0.5dB
- Idle channel noise: 58dB; 3000Hz >53Hz
- Signal to distortion ratio: 0~-30dBm0 >33dB; -30~-40dBm0 >27dB
- Impulse noise: 12dB; 600~3400Hz >15dB
- Channel crosstalk Isolation: >65dB@1004Hz
- Rtto customer equipment interface:
- RT loop current: >20mA
- RT On-Hook tip/ring voltage: 26VDC
- Ringing:
- Voltage: 65Vrms to 95Vrms
- Frequency: 20Hz to 25Hz
- Meter signal frequency: both 16KHz (12KHz option) and polarity reverse
- Power requirement:
- COT: -36~-72V DC; Maximum power consumption 28W
- RT: remote power fed via subscriber line; Maximum power consumption 4W
- Physical dimensions:
- COT: 177mm(H) x 434mm(W) x 334mm(D)
- RT: 345mm(H) x 214mm(W) x 53mm(D)
- Environmental conditions
- COT: Temperature 0 degree ~ +45 degree, Humidity 20%~80%
- RT: Temperature -20 degree ~ +60 degree, Humidity 5%~95%
Features
- ISDN technology ensures high quality transmission
- Supports voice/data/facsimile transmission
- Automatic number Identification(ANI)
- Remote power feed for the remote terminal - no local power or batteries required
- Redundant power supplies with auto-switching
- Duplicated power supplies
- Payphone interface for 16/12KHz and/or Polarity reversal metering system
- Network Management systems(NMS)
- Flexible 32K/64Kbps PCM transfer rate switchable by NMS software control
- Support a number of subscriber lines with single pair of wires from the Central office to the subscribers
Main Products
e1 / t1 digital loop carrier system ( DLC), digital pair gain system, HDSL, subscriber line concentrator, digital multiplexer, OLTE, optical fiber cable, etc.