The T1 interface supports D4(SF) or ESF frame formats with B8ZS or AMI line code. The E1 interface supports CCS (PCM31) or CAS (PCM30) framing without CRC-4 and framing with CRC-4. The line coding is HDB3.

Tests and diagnostics can easily be performed from the local console interface or via Web based management of the FRM220. Diagnostics include T1 local/remote and E1 local/remote loop back. When placed in a single slot chassis and used standalone without management, the card may be configured by DIP switches.

Features

• Converts between T1 and E1 data and signaling
• Enable equipment to operate at T1 and E1 rates
• Supports G.802 Annex B (T1 over E1)
• Configures A-law/μ-law and signaling conversion
• Transparent conversion at 64kbps timeslot level
• Controlled slip for buffer over or under flow
• 24 time slots of T1 Nx64 can be inserted into E1 Nx64, 30/CAS or 31/CCS timeslots

Download

FRM220-FTEC.pdf

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