Product SummaryRAD's SPD-E1 rate and interface converter enables E1 equipment to utilize two T1 transmission links by converting any E1 frame (2.048 Mbps) into two T1 frames (1.544 Mbps). The SPD-E1 is transparent to the E1 framing pattern. Jitter attenuation on each side guarantees smooth, jitter-free operation. Benefits• Enables E1 equipment to operate over T1 facilities Further Product InformationE1 to T1 conversionThe SPD-E1 rate and interface converter enables E1 equipment to utilize two T1 transmission links by converting any E1 frame (2.048 Mbps) into two T1 frames (1.544 Mbps). The SPD-E1 is transparent to the E1 framing pattern. Jitter attenuation on each side guarantees smooth, jitter-free operation. T1 parameters include D4 or ESF framing and AMI or B8ZS line codes. In the ESF format, T1 main link statistics are stored in the memory and may be retrieved by the service provider or by the user via a supervisory port. All timing situations are covered. These include transparent timing, loopback timing, internal clock and station clock. Independent elastic buffering in each direction compensates for short-term deviations in timing sources. Operating as an inverse multiplexer, the E1 frame (256 bits) is equally divided between both T1 frames, utilizing timeslots 1 to 16 of each T1 link. Spare bandwidth may be used to accommodate an additional n x 64 kbps data channel. The SPD-E1 is available as a standalone unit, with hardware available for mounting in a 19" rack. 
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