Interface Modules (WAN)Passport 4400 Hardware Installation Manual
7-2
WAN Serial Interface Module
The WAN Serial Interface Module (NTAU03AA) provides additional port
capability, identical to Port 1 on the base module. The module supports RS-232/
V.24, V.35, V.36, and X.21 interfaces, determined by the cable used. The module
can support both DTE and DCE modes.The WAN serial interface module can
be placed in Port 2 or Port 3.
The interface module must be inserted into the unit with the component side
facing down.
For pin assignments, see Figure 3-5 on page 3-5.
Figure 7-2. 3/4 and Back View of the WAN Serial Interface Module
56 kbps CSU/DSU Interface Module
The 56 kbps CSU/DSU Interface Module (NTAU02AA) supports the Dataphone
Digital Service (DDS) without the secondary signaling channel.
Note:
Refer to Appendix B, Regulatory and Telephone Company
Requirements for agency and telephone company
requirements.
This interface module supports the following loopback modes:
• DSU loopback
• CSU loopback
• Digital loopback
• Local loopback
• Local loopback transmit end (LLT)
• Local loopback receive end (LLR).
Both Port 2 and Port 3 can support the 56 kbps CSU/DSU interface module.
The interface module must be inserted into the unit with the component side
facing down.
An 8-position RJ-48C jack is provided to interface with the Dataphone Digital
Service network.
Rear View
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