Product Descriptions
The Advanced CMOS Frame Aligner PEB 2035 (ACFA) is a monolithic CMOS device which implements the interface to primary rate PCM carriers. It may be programmed to operate in 24- channel (T1) and 32-channel (CEPT) carrier systems.
The ACFA features include: selectable multiframe (six multiframe formats), error checking (CRC4, CRC6), multiple line codes (HDB3, B8ZS, AMI), and programmable signaling paths. The device includes functions which meet newest CCITT (Blue Book) and FTZ recommendations for primary rate interfaces and the AT&T Digital Multiplexed Interface specifications (DMI) plus some additional features requested by the market. Controlling and monitoring of the device is performed via a parallel eight-bit microprocessor bus.
The circuit contains a two-frame elastic memory which ensures wander absorption between the PCM carrier and a synchronous, system internal highway.
All signaling types - CCS, CAS and bit-robbed signaling in conjunction with Clear Channel Capability - are supported by the ACFA. In addition, the ACFA allows flexible access to facility data link and service channels. Extensive testing capabilities are included.
The ACFA is suitable for a wide range of voice and data applications. Below you find a list of equipment as described by the CCITT which potential ACFA applications.
Product Features
● Frame alignment/synthesis for 2048 kbit/s (CEPT, PCM 30) and 1544 kbit/s (T1, PCM 24)
● Meets newest CCITT Rec’s (Blue Book), FTZ Rec’s and AT&T technical advisories (DMI, August 1986)
● Programmable formats for
PCM 30: Doubleframe, CRC Multiframe
PCM 24: 4-Frame Multiframe (F4), 12-Frame Multiframe
(F12, D3/4), Extended Superframe (ESF), Remote Switch
Mode (F72)
● Selectable conditions for loss of sync
● Selectable line codes (HDB3, B8ZS, AMI with ZCS)
● Unipolar NRZ for interfacing fibre optical transmission routes
● Error checking via CRC4 or CRC6 procedures
● Insertion and extraction of alarms and facility signaling
● IDLE code insertion for selectable channels
Product Photos
For more product information, please download the PDF
