Motorola 49901 - Vanguard 340 Router, Инструкция по эксплуатации

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2-14 Hardware Description
Vanguard Daughtercards
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 2-15 shows the ISDN BRI Voice Daughtercard connectors as they appear on
the back panel.
Figure 2-15. ISDN BRI Voice Daughtercard Connectors
Note
For more information on supported daughtercard configurations, refer to the
Daughtercard Installation Manual (Part Number T0020) Chapter Five.
DSU The DSU Daughtercard provides an RJ48S connector and can support speeds of
56 kbps (synchronous). It conforms to AT&T 62310 point-to-point and multipoint,
and to ANSI T1/E1.4/91-006 56 kbps. The card supports the following capabilities:
• Internal/external clocking
• Internal/external loop back
• 4-wire line driver operation
The card also supports multidrop DSUs when either of these conditions exist:
• If a MARK Idle protocol is used (such as MX25).
• If the Telco uses an OR’ed or Data Contention is used to mix individual DRU
drops.
Figure 2-16 shows the 56K DSU Daughtercard connector as it appears on the back
panel.
Figure 2-16. DSU Daughtercard Connector
S-BUS
100
Ω
HI Z
S-BUS
BRI S
DSU