Technical Specifications:
E1 Interface: (Part No. VCL-MX-1520-E1-5.0)
Maximum number of interface cards
(in a single chassis)
As per requirement and upto 10
Used to map with Voice and Data Interface
Number of interfaces per E1 Interface
Card
8 E1 Interfaces
Conformity (electrical) G.703
Frame structure As per ITU (CCITT) G.704
Signaling Channel Associated Signaling
PCM Sampling Rate 8000 Samples / sec
Bit rate 2048 Kbps ± 50 ppm
Code HDB3, 50 % Duty Cycle
Nominal Impedance
120Ω balanced / 75Ω unbalanced
Peak voltage of a mark
For 120 Ω Balanced interface
75 Ω Unbalanced interface
3.0 V ± 0.3 V
2.37 V ± 0.237 V
Peak voltage of a space
For 120 Ω Balanced interface
75 Ω Unbalanced interface
0 V ± 0.3 V
0 V ± 0.237 V
Nominal pulse width 244 ns
Pulse mask As per ITU (CCITT) Rec. G.703
Output jitter <0.05 UI (in the frequency range of 20Hz to 100 KHz)
Permissible Attenuation 6 dB at 1 MHz
Return loss at:
51.2 KHz to 102.4 KHz
102.4 KHz to 2048 KHz
2048 KHz to 3072 KHz
> 12dB
> 18dB
> 14dB
Jitter tolerance As per ITU (CCITT) G.823
Frame alignment As per ITU (CCITT) G.732
Loss and recovery of frame alignment As per clause 3 of ITU (CCITT) G.732
Loss and recovery of multi-frame
alignment
As per clause 5.2 of ITU (CCITT) G.732
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