TAK's one of main products is voice(FXS,FXO) E1 pcm transmission multiplexer series,there are various model for different function,this article will summarize our company's voice(FXS,FXO) E1 pcm transmission multiplexer :

• 4*voice (FXS/FXO) E1 PCM multiplexer 
•  8* voice (FXS/FXO/POTS) E1 PCM multiplexer
•  16*voice (FXS/FXO/POTS) E1 PCMmultiplexer 
•  16*voice (FXS/FXO/POTS) E1 PCM Multiplexer 
•  30*voice (FXS/FXO/POTS) E1 PCM Multiplexer 
• 30*voice (FXS/FXO/POTS) E1 PCM Multiplexer(CAS signaling)
•  60*voice (FXS/FXO/POTS) E1 PCM Multiplexer

• 4*voice (FXS/FXO/POTS) + 4*Ethernet + 4RS232 E1 PCM multiplexer 
• 8*voice (FXS/FXO/POTS) + 4RS232 E1 PCM multiplexer
•  8*voice (FXS/FXO/POTS) + 4*Ethernet + 4RS232 E1 PCM multiplexer 
• 16*voice (FXS/FXO/POTS) + 4*Ethernet + 4RS232 E1 PCM multiplexer
• 30*voice (FXS/FXO/POTS) + 1*Ethernet E1 PCM multiplexer

Additional  function: 

• SNMP or console management 
• AC220V or DC-48V optional
•  Desktop or rack mount chassis type optional providing expansion interface, can be extended data RS232 / RS485 / RS422 / Manchester codes, switch,or 2/4 wire E&M etc.;

30* voice  E1 PCM multiplexer:

16* voice  E1 PCM multiplexer:

4* voice  E1 PCM multiplexer: