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To provide timing relays to one or more additional collocated E7-2 units, you can wire the
E7-2 external timing output interface as described below.
To wire the BITS timing output interface
1. Get up to two 24 AWG shielded 2-wire cables of sufficient length to reach the next E7-2
shelf. Use one cable to provide a single link (A only), or two cables for a redundant link
(A + B).
Note: You can use the optional Calix-supplied BITS daisy-chain cable instead. See the
note after Step 4 for installation instructions.
2. Strip approximately one inch (2.54 cm) of insulation from the wire ends.
3. Wire the E7-2 external timing output as follows:
a. Connect the timing wires to the E7-2 BITS OUT (A) output position:
Wrap the positive (tip) wire to the TIP+ pin.
Wrap the negative (ring) wire to the RNG- pin.
b. To provide a redundant timing link to the next E7-2, repeat Step 3a to wire the E7-2
BITS OUT (B) position, as required.
4. Route and dress the timing output cable to next E7-2 and connect per the input wiring
procedure above.
Note: If you are using the Calix-supplied BITS daisy-chain cable, connect the WW Pins
Out end to the BITS OUT pins on the upstream E7-2 unit, and connect the WW Pins
In end to the BITS IN pins on downstream unit. Repeat for each additional daisy-
chained E7-2 unit.
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