
138 Chapter 11
XMU+ Technical Specifications and Approvals
Card Specifications
Technical Feature... Details...
Control Card
Digital Audio Core Specifications:
Encoding /
Decoding:
8 bit PCM / 8 KHz sampling / µ-law (no data
compression)
Frequency
Response:
200 - 3400 Hz (+/- 3 dB)
Working Memory: Up to 1.5Gbit on memory modules
Channel Capacity:
Large chassis: 64 channels non-blocking plus 1 remote
channel
Small chassis: 24 channels using T1 line card or 8
channels using analog line card.
Core FPGA: Xilinx Spartan II / 50K gate / proprietary logic
Processor Core Specifications:
Processor type: Motorola MPC855T / 66 MHz core / 33 MHz bus / 3.3V
Processor Memory:
32Mbit NOR FLASH / 64Mbit SDRAM / up to 1.5Gbit
NAND FLASH on memory modules
Processor Firmware: Proprietary, with a Licensed Real Time Operating System
(RTOS)
Real Time Clock:
Accuracy: 2 minutes / year
Back-up power duration: 30 days
Port Specifications:
Remote:
Compatible with global PSTN (FCC / IC / CTR-21)
Ring detection feature
DTMF detection feature
Loop current direction detection feature
Connector: RJ 11
Impedance: 600Ω nominal
Input Level (AGC onset): -30 dBm
Nominal Output Level: -9 dBm
Loop current: 10 mA - 60 mA (limiting)
Off Hook Loop Voltage: 40VDC maximum
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