ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 233)

11. System Parameter Specification
MSAP2000 Technical Manual V3.0 11-4
11.4. E1
The following parameters will apply to modules of
QE1M (7.15)
Standard specification
Complies with ITU-T G.703/G.704/G.706 2048 Kbits Interface
Standards
Bit Rate
2048 Kbit/s
± 50 ppm.
Optical Line Code
HDB3
Impedance
Configured on Board
120 5% resistance, balanced (symmetrical cable)
75 5% resistance, imbalanced (Coaxia cable),
Frame format
Complies with ITU-T G.704