Nortel-networks Circuit Card Manuel d'utilisateur Page 619

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 908
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 618
NT8D14 Universal Trunk card Page 619 of 906
Circuit Card Description and Installation
DID trunks exceeding a loop resistance of 600 ohms
RAN trunks operating in pulse start or level start modes
Figure 140 on page 620 shows jumper locations on the universal trunk card
(vintage BA).
Service change entries
The trunk type, terminating impedance, and balance network are selected by
making service change entries in the Trunk Administration program LD 14.
See Table 193 on page 621 for the proper values for the trunk type and loop
length. Refer to Software Input/Output: Administration (553-3001-311) for
LD 14 service change instructions.
Before the appropriate balance network can be selected, the loop length
between the near-end and the far-end (a Central Office, for example) must be
known. To assist in determining loop length, some typical resistance and loss
values for the most common cable lengths are given in Table 194 on page 622
for comparison with values obtained from actual measurements.
Vue de la page 618
1 2 ... 614 615 616 617 618 619 620 621 622 623 624 ... 907 908

Commentaires sur ces manuels

Pas de commentaire