Envoy ACP/XF Configuration and Management Manual

WAN Subsystem Profiles and Modifiers for

EnvoyACP/XF

EnvoyACP/XF Configuration and Management Manual—429232-003

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Optional Modifier Descriptions

T1TIMER

Specifies a timer for the communications link. Set n to a value longer than twice the

time required for the transmission of a frame FRAMESIZE bytes in length, plus the

time required by delays in processing at each end of the link. T1TIMER takes different

definitions, depending on the protocol mode, as described below.

You can set or override this modifier by issuing a SETMODE 15 call in an application

or by issuing an SCF ALTER LINE command to the EnvoyACP/XF subsystem.

NRM Protocol—Primary Station

In NRM, T1TIMER initiates a timer when the primary station sends an I-frame with the

P-bit set (Figure 3-10). The timer specifies the period that the primary station waits to

receive a response from the secondary station. If the primary station does not receive

a response before the specified timeout, it sends an RR frame with the P-bit set. The

configured time for T1TIMER also specifies the period that the primary station waits to

receive a response to its RR frame transmission from the secondary station. The

number of times that the primary station sends the RR frame is specified by the

L2RETRY modifier. For additional information on timeout and retries, refer to the

EnvoyACP/XF Application Programming Manual.

Default: 500 (5 seconds)

Units: .01 seconds

Range: 10 through 32767

Figure 3-10. T1TIMER and NRM Primary Line

VST022.vsd

TITIMER specifies how long the primary station waits to receive a response

from the secondary station before sending an RR frame with the P-bit set.

Primary

Secondary

NRM

I-Frame with P-Bit

Set

RR Frame Sent with P-Bit

Set

RR Frame Sent with P-Bit