User`s guide

D-12 Preliminary November 23, 1998 MultiVoice Gateway for the MAX— User’s Guide
Cables and Connectors
E1/PRI interface specifications
T1/PRI WAN ports
Table D-11 lists the pins on RJ48C sockets used for T1/PRI WAN interface on the MultiVoice
Gateway. Only pins 1, 2, 4, and 5 are used. The remaining pins are not connected.
WAN switched services available to the MultiVoice Gateway
The MultiVoice Gateway is compatible with both AT&T and Northern Telecom central office
switches, and can access all T1/PRI switched digital services offered by AT&T’s ACCUNET
Switched Digital Services:
• MCI 56 Kbps and 64 Kbps services
• Sprint Switched 56 Kbps and 64 Kbps services
• MultiRate and GloBanD (and GVPN in CCITT countries) PRI network services
Note: The MultiVoice Gateway can access only Switched-56 Kbps services on a T1 access
line or a Switched-56 line.
For a listing of the compatible switch types, see the Switch Type parameter in the MAX
Reference Guide. In addition to switched circuits, the MultiVoice Gateway can connect to
nailed-up circuits and to aggregate nailed-up and switched circuits.
E1/PRI interface specifications
This section provides the specifications for the MultiVoice Gateway unit’s E1/PRI interface
and covers cabling requirements.
During loss of power or whenever the MultiVoice Gateway restarts, a relay closure returns the
E1 PRI signal to the WAN. That is, the E1 PRI line is looped back. However, if the MultiVoice
Gateway is configured for framing-compatible drop-and-insert functionality, all channels of
line #1 are passed to line #2. Note that line #1 and line #2 of a MultiVoice Gateway Net/E1
expansion module always loop back upon loss of power, regardless of how they are
configured.
E1/PRI cable specifications
The WAN interface cables and plugs described in this section are available for the MultiVoice
Gateway unit’s WAN interfaces. Use only the cable specifically constructed for transmission.
Table D-11.Transmit and Receive pins
MultiVoice Gateway T1/PRI
interface
RJ48C DTE
Receive (input) pair, Tip (T1)
Receive (input) pair, Ring (R1)
Position 2
Position 1
Transmit (output) pair, Tip (T)
Transmit (output) pair, Ring (R)
Position 5
Position 4