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10.4.4 Card Population Check and Card
Strapping Procedure
The accompanying charts give the proper loca-
tions of all cards required for a given configu-
ration of the 2400 bps integrated modem.
Cards that might require strapping have an X in
the square block that represents each card. Refer
to the appropriate diagram (10.4.5 through
10.4.11) for strapping instructions. When
placing straps (PIN 816645), connect the two
pins on opposite sides of the appropriate letter
(vertically and horizontally). Do not use uninsu-
lated strip-type program cap jumpers.
Notes:
1. The modem is internally set for 0 dbm transmit
levels. Attenuate this level by strapping if a lower
level is specified by the common carrier. The trans-
mit level may be marked on the common carrier
line coupler box (1000-B, COT, CBS).
2. For modem with CADUCEE feature (WT):
a. Switched network feature not on the machine.
b. If unconditional continuous carry is required,
attach a jumper from K4D11 to T2G03.
c. This is not a multipoint tributary modem; it is
not a point-to-point network. The card installed
at P2 is the CADUCEE feature card. Card
strapping is shown in Section 10.4.11.
Preamp, 02 (see note 1).
Limiter, K4.
Transmitter, J4.
Post-Processor, N4.
Interface (DTE), T2.
Modem Digital Logic (FEn, G2. (Check that capacitor,
PIN 2772926 or PIN 5182456, is connected between
G5B07
(+)
and H5D08.)
TestlOperate Logic, 04.
Basic timing options, K2.
Is the switched network feature on the
machine (do not confuse with SNBU, see note 2)?
Is this a multipoint tributary modem (see note 2)?
C1 Transmit Equalizer, S4.
Is this modem on a point-to-point network?
C1 Receive Equalizer T4.
Is this a multipoint control modem?
Does this have CADUCEE feature?
CADUCEE card, P2.
No such configuration, start over.
Data Communications
10-21
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