HP X09 Manuál stáhnout pdf (Strana 29)

XStream‐PKG‐E™EthernetRFModem–ProductManualv5.x00[2006.02.24]

HT (Time before Wake-up Initializer) Command

<Sleep (Low Power)> If any modems within

range are running in a “Cyclic Sleep” setting, a

wake-up initializer must be used by the

transmitting modem for sleeping modems to

remain awake [refer to the LH (“Wake-up

Initializer Timer”) Command]. When a receiving

modem in Cyclic Sleep wakes, it must detect the

wake-up initializer in order to remain awake and

receive data. The value of HT Parameter tells the

transmitter, “After a period of inactivity (no

transmitting or receiving) lasting HT amount of

time, send a long wake-up initializer”. HT

Parameter should be set to match the inactivity timeout [specified by ST (Time before Sleep)

Command] used by the receiver(s).

AT Command: ATHT

Binary Command: 0x03 (3 decimal)

Parameter Range: 0 – 0xFFFF

[x 100 milliseconds]

Default Parameter Value: 0xFFFF (means that

long wake-up initializer will not be sent)

Number of bytes returned: 2

Related Commands: LH (Wake-up Initializer

Timer), SM (Sleep Mode), ST (Time before

Sleep)

From the receiving modem perspective, after HT time elapses and the inactivity timeout [ST

Command] is met, the receiver goes into cyclic sleep. In cyclic sleep, the receiver wakes once per

sleep interval to check for a wake-up initializer. When a wake-up initializer is detected, the

modem will stay awake to receive data. The wake-up initializer must be longer than the cyclic

sleep interval to ensure that sleeping modems detect incoming data. When HT time elapses, the

transmitter then knows that it needs to send a long Wake-up Initializer for all receivers to be able

to remain awake and receive the next transmission. Matching HT to the time specified by ST on

the receiving modem guarantees that all receivers will detect the next transmission.

ID (Modem VID) Command

AT Command: ATID

Binary Command: 0x27 (39 decimal)

<Networking> Read the modem’s VID. VID is a

MaxStream-specific acronym that stands for

“Vendor Identification Number”. This number is

factory-set and allows modems with matching

VIDs to communicate. Modems with non-

matching VIDs will not receive unintended data

transmission.

Parameter Range (user-settable):

0x10 - 0x7FFFF

(Factory-set and read-only) :

0x8000 – 0xFFFF

Number of bytes returned: 2

Minimum Firmware Version Required: 4.2B

(Previous versions did not support user-

settable VIDs)

IU (DI2, DI3 Update Timer) Command

AT Command: ATIU

Binary Command: 0x3B (59 decimal)

Parameter Range: 0 - 0xFFFF [x 100 ms]

Default Parameter Value: 0x0A (10 decimal)

Number of bytes returned: 2

Related Commands: BK (Serial Break Passing),

BO (Serial Break Timeout), CO (DO3 Timeout),

DR (Disconnect), RT (DI2 Configuration), TO

(DO2 Timeout)

Minimum Firmware Version Required: 4.30

<Serial Interfacing> Set/Read the interval at

which the status of DI2, DI3 and Break is

transmitted. Additionally, status is transmitted

whenever there is a transition. A setting of “0”

disables periodic update. DI2 or DI3 passing

must be enabled for the update to take place.

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