PCM-30 Multiplexer can provides 1 to 30 lines optional customer interfaces(Voice and Data), into standard E1/2M signals for transmission.
PCM-30 Multiplexer can provides 1 to 30 lines optional customer interfaces, which are diversified and easy for multi-service accession; It converts multi-voice interfaces (including telephone, 2/4 lines audio frequency, 2/4 lines EM, magnet) and data interfaces (including V.21, V.22, V.24, V.28, RS232, RS422, RS485, V.35 and Ethernet) into standard E1/2M signals for transmission.

*It provides 30 lines of optional user interfaces of various types to facilitate the access of various services;
*The voice interface supports caller ID display;
*It can provide reverse signals;
*It directly applies 2M circuit for transmission;
*It is supplied with perfect function of status indication to facilitate maintenance and management;
*With small size, aesthetic appearance, and easy installation and operation.

E1  interface
Bit rate: 2048Kbps
Code type: HDB3
Interface impedance:75ohm 
Connector:CC4

10BASE-T  interface
Interface type:10Base-T
Interface velocity:10Mbps
Transmission velocity:N*64Kb/s (N = 1~30)
Protocol:bridge connection of link layer

User and loop interface
Impedance: 600ohm
Insertion loss:-3±0.75dB
Frequency characteristic:300 ~ 3400Hz (-0.6 ~ +3dB)
Weighted noise:≤ 63.7dBmop
Crosstalk loss:≥ 65dB

V.35  interface
Interface type:V.35 synchronous
Velocity:N*64Kb/s (N =1~15)
Clock mode: DCE

V.24(RS232) interface
Interface type:V.24 asynchronous
Velocity:0 ~ 19.2Kbps

2/4 line audio interface (2/4 line E&M interface)
Impedance:200ohm + 680ohm||0.1μF
4-line AD gain:14dB (adjustable)
4-line DA gain:-2 dB (adjustable)
4-line AD frequency response:-0.2 - +0.2dB
4-line DA frequency response:-0.2 - +0.2dB
2-line AD frequency response:-0.2 - +0.2dB
4-line DA frequency response:-0.2 - +0.2dB (adjustable)
Return loss:40dB
Degree of balance:70dB
Common-mode rejection ratio:70dB
Power-supply rejection ratio:30dB
Idle-channel noise:≥65dB
Loop resistance:600ohm