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Hardware Description 2-11
Vanguard Daughtercards
ISDN and
Enhanced ISDN
BRI-S/T Data
This card provides 2B+D Channel through a BRI S/T interface. It conforms to ITU
I.430, is LAPD:ITU Q.921 compliant, and supports:
• Integral X.31
• Q.931 dial support
• NI1, 5ESS, DMS-100, ETSI, Euro Numeric switch types
• D Channel Packet Mode
• Leased Circuit Services (I Interface)
• Permanent B for German Monopol support or Japan High-Speed Digital
Figure 2-12 shows the ISDN BRI-S/T Daughtercard connectors as they appear on
the back panel.
Figure 2-12. ISDN and Enhanced ISDN BRI-S/T Daughtercard Connector
Note
Termination options for the Release 6.3 and greater enhanced ISDN BRI ST data
Daughtercards are set in the Configure menu, and are not controlled by switches.
For more information, refer to the Vanguard Integrated Services Digital
Network: ISDN Manual (Part Number T0103-06).
ISDN BRI Voice This card provides 2B+D Channel through a BRI S/T interface. It conforms to ITU
I.430, is LAPD:ITU Q.921 compliant, and supports:
• Integral X.31
• ITU-T Q.931 (EURO IDSN) - ETSI switch type to connect to PBXs and
public networks.
• ECMA 143 - QSIG Basic Service to connect to PBXs over private line.
• ECMA 165 - QSIG Generic Functions for Support of PBX Supplementary
Services.
• ITU-T G.711A (A-law) and G.711U (µ-law) interface voice encoding.
• ITU-T G.723, G729, and VanguardMS proprietary CVSELP packet voice
compression.
Figure 2-13 shows the ISDN BRI Voice Daughtercard connectors as they appear on
the back panel.
Figure 2-13. ISDN BRI Voice Daughtercard Connectors
S-BUS
100Ω
HI Z
S-BUS
BRI S
BRI-S/T DATA
LINK
D-ACT
TERMINAL LINE
Enhanced
S-BUS
100Ω
HI Z
S-BUS
BRI S