CHAPTER iil, SECTION 8
led with faster over-all service and more fully
secured facilities. This circuit was used as an
alternate for H&N when the normal ACAN
Practically all the overseas teletype traffic
at Jobsite was routed through the Army Command and Administrative Net
(ACAN), via
the relay stations in Hawaii, San Francisco
and Eniwetok. The ACAN net enabled traffic
to be exchanged with all CONUS points, including service with commercial telegraph and
cable companies. A supplementary ‘through
circuit”-Los Alamos to PPG-equipped with
Sampson devices permitted traffic to be handMESSAGES
Sent
Received
Relayed
Services
Total
channels were jammed with traffic. When such
messages were received at Los Alamos, they
were refiled into the ACAN net for all CONUS
addresses. Teletype traffic at Jobsite reached
peak activity during the months of April and
May. Traffic for these two months is detailed
elow:
APRIL
MAY
2,513
2,765
3,097
555
160
6,325
3,238
1,071
148
7,222
PRECEDENCE
Operation Immediate
1.7 per cent
11.2 per cent
Priority
32.1
"
32.1
”
Deferred
6.7
”
5.3
=”
Routine
59.5
”
32.1
”
CLASSIFICATION
Secret
Confidential
Unclassified
1.7 per cent
9.7
88.6
“
”
6.3 per cent
14.2
79.5
”
”
HANDLING TIME
Incoming
Outgoing
Relayed
Average
2.1 minutes
4.0
”
2.2
”
2.7
”
2.7 minutes
5.2
”
1.1
”
3.0
”
13,487
16,837
183
16,954
14,028
3,639
DAILY AVERAGE GROUP COUNT
Outgoing
Incoming
Relayed
Telecons
Services
Communications from the Home Office to
Jobsite were one of the functional responsibilities of the Office Services Section. During the
early stages of the Operation, two operators sufficed for all communications traffic, but in July
1955, an additional operator was required. On 10
February 1956, unattended teletype service was
provided for the receipt of messages transmitted
via the ACAN network. Messages were thus received during non-working hours and available
for delivery upon the return of operators to
Page 3-46
596
°
503
215
duty. The peak of Home Office traffic was i:
February 1956 when a total of 3,150 messages
were handled for the month.
An overseas voice channel between th
PPG, Hawaii, and the ZI was first activated *
December 1954 by the Armed Forces. To date,
because of technical difficulties in this circuit.
transmission between Jobsite and Honolulu h
been only fair and between Jobsite and t!
ZI, unsatisfactory; the circuit was therefore seldom. used.