Nortel-networks Circuit Card Manual do Utilizador Página 642

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 908
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 641
Page 642 of 906 NT8D15 E&M Trunk card
553-3001-211 Standard 3.00 August 2005
Idle state
For E&M signaling, in the idle state the M lead is ground and the E lead is an
open circuit.
Outgoing calls are processed as follows:
The M lead changes from ground to battery.
If answer supervision is provided by the far end, there is a change
from open to ground on the E lead (ground detection).
Figure 148
Signaling orientation for tandem connection between E&M and CO trunks
Far end PBX
CO
553-6262
Near end PBX
(senderized)
E&M
Incoming
Outgoing
Tie trunk
PBX-CO trunk
CO/FX/
WATS
Vista de página 641
1 2 ... 637 638 639 640 641 642 643 644 645 646 647 ... 907 908

Comentários a estes Manuais

Sem comentários