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| Multipoint Switching and Conferencing Unit-Attenuation (MUSACTM -A) PEB 2445 General Description The MUSAC-A is an upward compatible device to the components MTSC and MUSAC. Additionally to the standard MUSAC features switching and conferencing, the MUSAC-A supports additional attenuation functions. Every time-slot is freely programmable in 1-dB step resolutions to an attenuation range from 0 to 12 dB and amplified from 0 to 4 dB. With enlarged attenuation functions to every time-slot the MUSAC-A fulfills the ability for new requirements. l.e. different PBX terminals could be adapted to a certain reference point from the private network to the public network. Features Switching * Time/space switch for 2048-, 4096- or 8192-kbit/s PCM systems * Switching of up to 512 incoming PCM channels to up to 256 outgoing PCM channels * 16 input and 8 output PCM lines * Different kinds of modes (2048, 4096, 8192 kbit/s or mixed mode) * Configurable for a 4096- and 8192-kHz device clock * Tristate function for further expansion and tandem operation Attenuation and Amplification * Attenuation and amplification of every time-slot * Attenuation range from 0 to 12 dB * Amplification range from 0 to 4 dB Type PEB 2445-N Conference Mode Package P-LCC-44-1 (SMD) * Up to 64 conference channels in any combination * Up to 21 independent conferences simultaneously (3 subscribers) * Programmable attenuation (0/3/6/9 dB) on each input channel * Programmable attenuation (0/3 dB) on each output channel * Programmable PCM-level adaption (attenuation or amplification) of up to 64 channels * Programmable noise suppression (four thresholds) * Conference overflow handling * Tone insertion capability * A-Law/-Law compatible * Compatible with all kinds of PCM-byte formats Multipoint Switching * Multiple independent LAN s within one PBX * Multiplexing of up to 64 channels * 64-kbit/s channels General * * * * * 8-bit P interface Single + 5-V-power supply Advanced low power CMOS technology TTL compatible inputs/outputs Upward compatible to MTSL Siemens Aktiengesellschaft 1 Multipoint Switching and Conferencing Unit-Attenuation (MUSACTM -A) PEB 2445 Timing PCM IN Time Switch Attenuation PCM OUT Signal Processor P Interface Address Block Diagram Data Control ITS03806 Reference Point Private Network Analog Line Card ISDN Line Card Prop. Line Card C Public Network a/b Analog MUSAC TM -A NT 2B + D ISDN Central Office NT CEPT / T1 ISDN Loudness Ration Echo Attenuation ITA03955 PBX-Example Attenuation for Every Time-Slot Siemens Aktiengesellschaft 2 |
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