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6 June 2005 MIM4-A2-GZ41-00

T1 Default Settings

No configuration is necessary for the MIM-4T1 to operate at default settings:

 Speed: Adaptive. The MIM-4T1 determines timeslot and bandwidth

configurations via communication with the remote T1 equipment to which it is

connected. Each T1 connection has the capability of receiving data across all

24 channels at 1,536 kbps.

 Frame Type: Extended Super Frame (ESF)

 Line Code: Bipolar with 8 Zero Substitution (B8ZS)

 Line Attenuation: 0 dB

T1 Parameter Configuration

MIM-4T1 parameters may be configured using the web-based Network

Management System (NMS). Refer to the NMS User’s Guide (Document Number

NMS-A2-GB20) for detailed instructions.

Frame Type

Frame type is the T1 data encapsulation method. A frame consists of 193 bits

(8-bit samples of each of the 24 T1 data channels plus a synchronization bit)

transmitted at a rate of 8,000 frames per second (1.536 kbps) across the T1 line.

 Extended Super Frame (Default) – Extended Super Frame (ESF) format, used

in Wide Area Networks (WANs), assembles data into 24-frame transmission

clusters and integrates the following:

— Facilities Data Link (FDL): in-service monitoring and diagnostics

— Cyclic Redundancy Check (CRC): scrutinization of data integrity and

detection of line errors

 Super Frame – Super Frame (SF) format assembles data into 12-frame

transmission clusters. SF does not utilize FDL or CRC.

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