SDM-9XXX Series Hardware Installation Guide
4-24 Memotec Inc.
T1/E1 Interface Cards at 75 Ohms
Ordering part numbers for the SDM-9220/9230:
161-1032-001 (single port interface card) or
161-1032-002 (dual port interface card) with
AG2CA0001 (RJ-48 to dual BNC cable)
Ordering part numbers for the SDM-9120:
161-1332-001 (single port interface card) or
161-1332-002 (dual port interface card) with
AG2CA0001 (RJ-48 to dual BNC cable)
• Supports digital voice/data at 75 Ohms
• Provides a 2.048 Mbps channelized digital connection with up to 32 timeslots
• Single port interface with one RJ-48 female connector
• Dual port interface with two RJ-48 female connectors
• RJ-48 to E1-75 dual BNC adaptor cable provides an E1-75 connection
CAUTION:: To prevent electromagnetic interference, you must also
strap 2 jumpers for each port that will be used as an E1-75 connection.
For details and installation procedure, refer to “E1-75 Jumpers” on
page 3-13.
• G.704 framing and HDB3 line coding
• Maximum 3 interface cards per unit, providing a maximum of 120 voice chan-
nels or 124 data channels
Requires a DSP-160 or HD DSP module for voice calls (see “Installing or
Upgrading the DSP Module” on page 3-5).
• Interoperability with other channelized digital interface cards:
- Can be installed and operated on a unit that has one or more single/dual port
T1/E1, ISDN-BRI S/T, or legacy E1 interface cards installed in the other slots.
- Cannot be installed on a unit that has one or more legacy T1 interface
cards installed in the other slots.
Workaround: Substitute a dual port T1/E1 interface card for the T1 interface,
and configure it for T1 operations.
• E1 operations are indicated when the
T1-E1 LED is yellow (see Figure 4-15). To
interpret the other status LEDs, see “Interface Card Status LEDs” on page 4-27.
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