V.35 Fiber Modem Installation and Operation Manual
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RX as the receiving terminal.
There is a coded switch S5 on the panel, which is used as the system
configuration switch to set such functions as clock, time slot, phase, loopback and
pseudo-random code test etc.
Wherein, S5.1 and S5.2 are clock settings.
S5.1＝OFF, S5.2=OFF：network clock at V.35 interface(Received Recovered).
S5.1 ＝OFF，S5.2＝ON：network clock at the optic fiber interface (Received
Recovered).
Remote time slot setting can be tracked only at this status.
S5.1=ON, S5.2=OFF: invalid
S5.1 ＝ON，S5.2＝ON：using local crystal OSC generating clock
S5.3: time slot setting
S5.3＝OFF，using remote time slot setting (valid only when S5.1 ＝OFF，S5.2
＝ON) S5.3＝ON，using local time slot setting
S5.4: for V.35 receiving clock phase selection
S5.4=OFF, using positive phase
S5.4=ON, using negative phase
S5.5: Local loopback setting (optic interface in direct loopback), ON valid.
S5.6: Local digital loopback (V.35 interface loopback), ON valid.
S5.7: Remote digital loopback (V.35 interface loopback), ON valid.
Valid at framing mode (0 time slot unused).
S5.8: Pseudo-random code test, ON valid, and valid at loopback status.
V.35 Fiber Modem bottom coded switch：
Baseplate Coded Switch
After time slot 0 is valid, other coded switches in whatever positions are all valid.
Select the number of time slots according to the expected rate. Normally for an
independent type, a time slot setting of automatic tracking Central Site module is
selected. Coded switches of plate-clip time slot correspond to S1, S2, S3 and S4.
V.35 Fiber Modem/DC rear panel：
V.35 Fiber Modem/DC Rear Panel Schematic
48V DC：–48Vdc input jack
