Cisco 1003 - 1003 Router Manual de usuario descargar pdf (Pagina 5)

Designing ISDN Internetworks 11-5

Introduction

Table 11-2 ISDN Switches in Australia, Europe, Japan, and New Zealand

Table 11-3 lists the ISDN-capable switches that are used in Canada and the United States.

Table 11-3 ISDN Switches in Canada and the United States

Note The functionality of the National ISDN switch is evolving. The levels of functionality are

known as NI1, NI2, and NI3.

TEI Negotiation

(This section applies to BRIs only.) Some switches deactivate Layer 2 of the D channel when no calls

are active, so the router must be conﬁgured to perform TEI negotiation at the ﬁrst call instead of at

router power-up (the default).

Service Proﬁle Identiﬁers

(This section applies to BRIs only.) A service proﬁle identiﬁer (SPID) is a number provided by the

ISDN carrier to identify the line conﬁguration of the BRI service. SPIDs allow multiple ISDN

devices, such as voice and data, to share the local loop. SPIDs are required by DMS-100 and

National ISDN-1 switches. Depending on the software version it runs, an AT&T 5ESS switch might

require SPIDs.

Each SPID points to line setup and conﬁguration information. When a device attempts to connect to

the ISDN network, it performs a D-channel Layer 2 initialization process that causes a TEI to be

assigned to the device. The device then attempts D-channel Layer 3 initialization. If SPIDs are

necessary but not conﬁgured on the device, the Layer 3 initialization fails, and the call cannot be

completed.

Country Switch Type Keyword

Australia TS013 BRI switch, TS014 PRI switch basic-ts013, primary-ts014

France VN2 ISDN switch, VN3 ISDN switch vn2, vn3

Germany 1TR6 ISDN switch basic-1tr6

Japan NTT ISDN switch, ISDN PRI switch ntt, primary-ntt

New Zealand NET3 ISDN switch basic-nznet3

Norway NET3 ISDN switch (phase 1 only) basic-nwnet3

United Kingdom NET3 BRI switch, NET5 PRI switch basic-net3, primary-net5

Switch Type Keyword

AT&T basic rate switch basic-5ess

NorTel DMS-100 basic rate switch basic-dms100

National ISDN-1 switch basic-ni1

AT&T 4ESS (ISDN PRI only) primary-4ess

AT&T 5ESS (ISDN PRI only) primary-5ess

NorTel DMS-100 (ISDN PRI only) primary-dms100

1 2 3 4 5 6 7 8 9 10 ... 33 34

Sin comentarios

Cisco 1003 - 1003 Router Manual de usuario Pagina 5