Nortel-networks Circuit Card Manual de usuario descargar pdf (Pagina 645)

100

101

NT8D15 E&M Trunk card Page 645 of 906

Circuit Card Description and Installation

Incoming calls

The far-end initiates calls as follows:

• The ground is placed on the E lead in E&M signaling.

• Dial pulses are subsequently applied from the far-end as ground open on

the E lead.

• If the far-end is equipped for sending, the system can operate in any

mode (immediate start, delay dial, or wink start), as assigned on a start

arrangement basis. See Table 197.

— In immediate start mode, there is no start signal from the called

office. The seizure signal (off hook supervisory state) from the

far-end should be at least 150 ms. At the end of the seizure signal,

the far-end can start pulsing after the standard delay (normally 70 ms

minimum).

— In delay dial mode, a 256–384 ms off hook/on hook signal is

returned to the far-end immediately after receipt of the seizure

signal. When the far-end detects the on hook signal (start signal), the

far-end can start pulsing after the standard delay (normally 70 ms

minimum).

— In wink start mode, within a 128–256 ms period after receipt of the

seizure signal from the far-end, the called office transmits a 250 ms,

wink start, off hook/on hook signal to the calling office.

E&M Type II signaling

Figure 151 on page 647 shows E&M Type II signaling patterns for incoming

and outgoing calls. Figure 152 on page 648 shows Type II signaling patterns

Table 197

Operation Mode

Operation mode Start arrangement

Immediate start IMM

Delay dial DDL

Wink start WNK

1 2 ... 640 641 642 643 644 645 646 647 648 649 650 ... 907 908

Comentarios a estos manuales

Sin comentarios

Nortel-networks Circuit Card Manual de usuario Pagina 645

Comentarios a estos manuales

Relacionado con productos y manuales para Hardware Nortel-networks Circuit Card