Specifications

Configuration Tasks

Cisco IOS Release 12.0(3)T

defines R2, but a number of countries and geographic regions implement R2 in entirely different

ways. Cisco Systems addresses this lack of standards by supporting many localized implementations

of R2 signalling in its Cisco IOS software.

Cisco Systems’ E1 R2 signalling default is ITU, which supports the technology used in the following

countries: Denmark, Finland, Germany, Russia (ITU variant), Hong Kong (ITU variant), and South

Africa (ITU variant). The expression “ITU variant” means there are multiple R2 signalling types in

the speciﬁed country, but Cisco supports the ITU variant.

Cisco Systems also supports speciﬁc local variants of E1 R2 signalling in the following regions,

countries, and corporations:

• Argentina

• Australia

• Brazil

• China

• Colombia

• Costa Rica

• East Europe (includes Croatia, Russia, and the Slovak Republic)

• Ecuador ITU

• Ecuador LME

• Greece

• Guatemala

• Hong Kong (China variant)

• Indonesia

• Israel

• Korea

• Malaysia

• Mexico (Telmex corporation)

• Mexico (Telnor corporation)

• New Zealand

• Paraguay

• Peru

• Philippines

• Saudi Arabia

• Singapore

• South Africa (Panaftel variant )

• Thailand

• Uruguay

• Venezuela

• Vietnam