23
CHAPTER 3: Standalone Installation
Table 3-2. Strap Selection, Standalone Version (continued)
Strap Identity Function
Possible
Standard
Settings
Factory Settings
No. 11
Enables/disables control of the DIG,
DIS
SWITCH
ANA, and REM loopbacks with the
EN
EN
front-panel pushbuttons.
No. 12
CONN.: Connects Signal Ground to
CONNECT
CONNECT
CHAS GND
Chassis Ground.
DIS CONN
DIS.: Isolates grounds from each other.
No. 13
ON: AGC always ON.
ON
ON
AGC
CTRL: AGC ON if DCD is ON, remains
CTRL
at last level of amplification if DCD
goes OFF.
No. 14
ON: Activates V.54 delay, preventing
ON
V.54-DLY
multiple loopback of tail-end circuits.
OFF
OFF
OFF: No delay.
No. 15
S3 and S4 determine character lengths
S3
S4
# bits
ASYNC
when unit is in async mode. See
OFF OFF = 8
LENGTH
Table 3-3 on the next page.
OFF ON = 9
ON
OFF = 10
10 bits
ON
ON = 11
S2 determines amount of stop-bit
ON = 25%
shortening for async mode.
OFF = 12.5%
12.5%
(S1 is not used)
No. 16
ON: If it stops receiving power, the unit
ON
ON
RPF
sends a special alert tone to the unit
OFF
at the other end of the line.
OFF: The unit does not send a tone
when it stops receiving power.
RPF should be set to OFF in multipoint
applications.
Содержание ME760A-R2
Страница 26: ...25 CHAPTER 3 Standalone Installation Figure 3 2 The standalone LDM MR19 2 s board layout...
Страница 30: ...29 CHAPTER 4 Card Installation Figure 4 2 The RackNest 2 14 illustrated GND RCV XMIT ON 1 7 2 5 3 4 6...
Страница 35: ...34 LDM MR19 2 Figure 4 3 The LDM MR19 2 card s board layout...
Страница 38: ...37 CHAPTER 5 Operation Figure 5 2 The LDM MR19 2 card s front panel 1 2 3 4 5 7 A 6 B C D...
Страница 46: ...NOTES...
Страница 47: ...NOTES...
