User manual

Beijing Raisecom Science & Technology Co., Ltd. http://www.raisecom.com
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1.3 Equipment Interconnection
When connecting with other optical multiplexers, it is required to follow the instructions below.
Otherwise, link faults or abnormal data transmission may occur.
Chapter 2. Recommended Connection Type
2.1 Precautions before Connection
2.1.1 Three Types of Timing Resource
 Master Clock Mode: The timing resource is provided by the crystal oscillator inside the
equipment, also called Internal Clock.
 Slave Clock Mode: The timing resource is provided by recovering the clock from the fiber
optic receiving link, also called Restoring Clock.
 Terminal Clock Mode: The timing resource is provided by the DTE, also called System
Clock.
2.1.2 Compatibility
If RC802-30B-FV35 is connected with G.703 interface fiber optic modem, and then connected
with other brand name E1 fractional mode equipment (i.e. V.35 to fractional E1 interface converter,
E1 interface Router); or such equipment as DXC and MUX is serially connected in the E1 link,
the following requirements shall be noticed.
1. PCM30/31 format must be the same
2. The status of CRC enable/disable function must be the same
3. The V.35 signal bandwidth engrossment of G.704 frame pattern must match
4. Ensure that there is only one timing resource in the whole link. Other PCM equipment shall
be configured to Slave Clock Mode (following the link clock).
2.2 Basic Connection Type
The connection topologies introduced in this part is only for user reference. Users are advised to
design and deploy the most appropriate topology according to their specific environment.