Specifications

14 Interface Specifications
Interface Specifications
The standards compliant with the interfaces supported on the HSI
port are listed in Table 2. The rest of this section describes the
allocation of pins used to implement the electrical and signalling
requirements of each interface.
Table 2. Interface Compatibility
Interface Standard Compatibility
V.24 CCITT V.24 Signalling
CCITT V.28 Electrical
CCITT X.21bis Electrical and signalling
RS-232-C Electrical and signalling
ISO 2110 Connector type for the DCE side of a
V.24 HSI Modem Cable
V.35 CCITT V.28 Some signals for electrical
CCITT V.35 Some signals for electrical and signalling
ISO 2593 Connector type for the DCE side of a
V.35 HSI Modem Cable
X.21 CCITT X.21 Signalling
CCITT V.11 Electrical
CCITT X.27 Electrical
RS-422-A Electrical
ISO 4903 Connector type for the DCE side of an
X.21 HSI Modem Cable