Juniper Networks M7I - Manual (Page 62)

E1/T1 Circuit Emulation PIC (M7i Router)
• Junos OS Release 9.3 and later Software release
• Configurable as either twelve E1 ports or twelve T1 ports
NOTE: Mixing E1 and T1 ports on the same PIC is not supported.
• Power requirement: 0.52 A @ 48 V (25 W)
• Onboard DSU functionality for E1 connectivity
Description
• Maximum transmission units (MTUs) of up to 1024 bytes
• Per-interface diagnostics and loopback control
• Per-interface alarm and event counting and detection
• Framing
• 4-bit CRC for G.704 framed mode
• G.704 without CRC4
• Unframed
• Balanced and unbalanced modes
• Full bit error rate test (BERT)
Hardware features
Copyright © 2010, Juniper Networks, Inc. 62
M7i Multiservice Edge Router PIC Guide