ADEMCO 4160-12 C-COM Dokumentacja Pobierz pdf (Strona 46)

Sme tigit~ ccmmmicatcrs manufactured by other companies (FrsnUin, DCI

are among th-e ) have long delays between the first and second transmitted

messages. Additiondly, sme communimtors dso have a long time delay

between the receipt of the handshake tone and the start of the mesag=.

In order to accommodate these units , a Slow Commmicator option is

avafiable. When this option is chosen, the No. 685 wfll wait up to 7.5

seconds btween the handshake tone and the start of m-sages.

In addition,

the ~lcwable intemessage time is approximately 9 secon~.

Since the waiting periods are increased, in the Slw Communicator option,

the system tbrou@pnt wfll be reduced when it is chosen. If Ofiy Ademm

ccmunicating devices are used, this option is not recommended.

However,

if a doubt”etiste, it shotid be chosen.

To test a communicator to see if it may be used without choosing this

option, test transmissions sho~d be sent to the No. 685. A test shO~d be

made with an Qarm code of ‘1” aa well as another test with sc derm code

of ‘9n. The MD at the top of the line card will be lit as long as that

line card is processing a call. When two or more line cards are connected

to a rotary group, most calls will be processed on the first =rd. RY

obserting the cards during a test transmission, one can determine whi~

=rd is processing the =11. To test a particdar =d in a rotary group,

‘busyW the other lines and send in a test transmission.

To ‘busyW a line,

connect a handset across it (or use a 560 ohm, 1 watt resistor if a handset

is not avaflable).

To choose

the S1- Cmuoi=tnr option, cut ths OWN= loop jm~r lo=t ed

at the line card’s upper right area (see Diagram 5).

Ssndehaks U-f icstion Option (No. 685-1 LOW SPEED Format Line Cards O~Y):

Sme digitd c-ticators manufactured by other cmPtia (e.g., N~CO

DD450) do not time the duration of the hsndetike si~al. As a restit, theY

may interpret the ~GH SPEED acknowledge or the

‘holdw si~~ produced by

the No. 685 as a handshake signal.

This will cause the communicator to

sand its message before the true handshake signal is seti..

Use of these ccmmunimtors with the No. 685-2 or No. 685A (if progr-ed

for Adammco High Sked) Line Card is not advised.

The No. 685-1 Line Card may @ modified to eliminate the “hldw sign~ t~t

is transmitted before the handshake tone.

To do this, proceed as follows:

1. Cti tk =MOW loop jmper 1 ocated at the line card’s upper canter

mea (see Diasr= 5).

2. -ert so mpro~-ed No. 691 Pm in the empty socket located telow

the line card’s option jupera (see Dia~~ 5). use a No. 6g2 pROM

Ina=tion Tool.

The triangular mark on the PROM sbcfid be positioned

in the lower left-hand corner (label “uPad+dmn” ).

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