E1/T1 Cross Rate Converter

CT-FRM220-FTEC

Managed or unmanaged converter enables conversion between one T1 signal and one E1 signal with flexible timing options.

T1 interface supports D4(SF) or ESF frame formats (B8ZS or AMI line code)
E1 interface supports CCS (PCM31) or CAS (PCM30) framing with or without CRC-4
Configures A-law/μ-law and signaling conversion
Supports G.802 Annex B (T1 over E1)
Transparent conversion at 64kbps timeslot level
24 time slots of T1 Nx64 can be inserted into E1 Nx64, 30/CAS or 31/CCS timeslots
Controlled slip for buffer over or under flow

Overview

The FRM220-FTEC is a T1 (US Standard) /E1 (European Standard) converter and timeslot cross connect which enables conversion between one T1 signal and one E1 signal. T1 and E1 signals with framing employ u-Law and A-Law compander encoding principles respectively and encode those analog (voice) signals into 64kbits digital data. 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.

Management options

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.

Comprehensive Timing

Transparent Timing
In this mode, the clock signal recovered from the E1 signal by the FRM220-FTEC is used as a reference for the T1 transmit clock generation circuits. The clock signal recovered from the T1 signal by the FRM220-FTEC is used as a reference for the E1 transmit clock generation circuits. Slips will occur if both E1 and T1 clocks are not referenced to Stratum 1 clock source.

Loop Back Timing
In this mode, the clock signal recovered from the E1 received signal is used by the FRM220-FTEC as a reference for the E1 transmit clock. The clock signal recovered from the T1 received signal is used by the FRM220-FTEC as a reference for the T1 transmit clock. Slips are possible if both E1 and T1 clocks are not referenced to Stratum 1 clock source.

Recovery Timing
In this mode, the clock signal recovered from the T1 received signal is used by the FRM220-FTEC as a reference for the E1 and T1 transmit clock generation circuits. The E1 equipment should not be connected to any other network timing.

E1 Recovery Timing

In this mode, the clock signal recovered from the E1 received signal is used by the FRM220-FTEC as a reference for the E1 and T1 transmit clock generation circuits. The T1 equipment should not be connected to any other network timing.

Internal Timing
In this mode, the internal oscillator (1544Khz or 2048Khz) of the FRM220-FTEC provides the reference clock for the T1 and E1 transmit clock generation circuits. The E1 and T1 equipment should not be connected to any other network timing.

Lifetime Support

This product comes with free lifetime telephone support.

Data Sheet

CTCE-FRM220-FTEC-LA.pdf

Specifications

Item	Description
E1 Interface	Framing CAS/PCM30 or CCS/PCM31 selectable Bit rate 2.048Mbps Line Code HDB3 Line Impedance 75 ohm (BNC) / 120 ohm (RJ-45) Voice channel sample rule A-Law CRC check CRC-4 enable/disable Pulse amplitude Nominal 2.37V ±10% for 75ohm Nominal 3.00V ±10% for 120ohm Zero amplitude ± 0.1V Connector RJ-45
T1 Interface	Framing D4, ESF selectable Bit rate 1.544Mbps Line Code B8ZS / AMI Equalisation 0 ~ 655 feet settable Voice channel sample rule μ-Law CRC check CRC-6 when ESF Line Impedance 100 ohms Transmit Pulse level 3.0V ±10%, Receive signal level 0 ~ -10dB Connector RJ-45
LEDs	PWR, Sys, Test, T1/E1
Standard	ITU-T G.703, G.704, G.706, G.823, G.824, ANSI T1.403
Power	12VDC
Power Consumption	< 6W
Dimensions	Card: 155 x 20.8 x 88mm (D x W x H)
Weight	130g
Temperature	0 ~ 50°C (Operating), -10 ~ 70°C (Storage)
Humidity	10 ~ 90% non-condensing
Certification	CE, FCC
MTBF	57,000 hrs