Specifications

Installation and Operation Manual Chapter 4 Configuration
MiRICi-E3T3 Ver. 2.2 Configuring for Operation 4-13
 Tx Clock Source. Choose the clock source of the Tx line.
 Internal Clock. Select this option to choose the internal oscillator
source.
 LBT. Link to the loopback timing.
 Protocol. You may choose a protocol according to the following MiRICi-
E3T3 definitions:
 T3 Framed mode – GFP, HDLC or cHDLC (High Level Data Link
Control).
 T3 Unframed mode - HDLC or cHDLC (High Level Data Link Control)
 VCAT Overhead. If enabled, VCAT header is added to frames (only in GFP
mode).
 Payload FCS (32 Bit). If enabled, a frame check sequence field is carried
by every frame as a payload for error detection (only in GFP mode).
 Scrambler. If enabled and supported on both ends, information such as
emails or voice gets truncated until it arrives at its destination (only in
GFP mode).
 GFP Keep Alive. If enabled, MiRICi-E3T3 sends 2-3 keep alive messages
per second. You should enable this parameter if MiRICi-E3T3 is used with
old equipment and LOFs are frequently encountered (only in GFP mode).
 Line Code. You may choose either B3ZS or AMI.
 B3ZS. A T-carrier line code, referred to as bipolar with three-zero
substitution, in which bipolar violations are deliberately inserted if the
stream of user data contains a string of 3 or more consecutive zeros.
 AMI. Referred to as Alternate Mark Inversion because a 1 is referred
to as a mark and a 0 as a space.
 Line Type. T3 C-bit , T3 M23 or T3 Unframed (only in cHDLC or HDLC
mode) are the line types available at present.
 FEAC Code Receive. If enabled, FEAC bit codes for “Loop up” and “Loop
down” commands are processed, otherwise they are ignored.
 Line Length. This parameter refers to Line Build Out.
 Up to 225 ft. The transmitted signal complies with the pulse mask
standard (G.703) for a cable length of up to 225 ft.
 225 ft to 900 ft. The transmitted signal complies with the pulse mask
standard (G.703) for a cable length between 225 ft and 450 ft.
 Idle Code. Fixed to 7E (only in HDLC or cHDLC mode)
3. Click Save.