MSBR Series  41  Mediant 800 MSBR 
Hardware Installation Manual   6. Cabling the Device 
6.2.5  E1/T1 WAN Cabling 
The device provides a WAN connection through up to four E1/T1 WAN  Data Service 
Unit/Channel Service Unit (DSU/CSU) port interfaces. The E1/T1 WAN lines transmit and 
receive data using IP over Point-to-Point Protocol (PPP) framing (up to two separate links), 
IP over High-Level Data Link Control (HDLC) framing (up to two separate links), or bundling 
both physical links into a single logical link using IP over Multilink Point-to-Point Protocol 
(ML-PPP) framing (RFC 1717). 
Cable specification: 
  Connector: RJ-45 
  Connector Pinouts: 
Figure  6-7: RJ-45 Connector Pinouts for E1/T1 WAN 
 
If the device is ordered with a single E1/T1 WAN port, a splitter cable adapter (RJ-45 male 
to two RJ-45 female shielded) is supplied to provide connection to one or two E1/T1 lines. 
The Customer Product Number (CPN) for this cable is RCBA50002. If the device is ordered 
with multiple E1/T1 WAN ports (e.g., two or four ports), a splitter cable is not required as 
these ports already reflect the E1/T1 WAN line connections. 
Figure  6-8: Splitter Cable for Single E1/T1 WAN Port 
 
 
Warning:  To protect against electrical shock and fire, use a 26 AWG min wire to 
connect the T1 WAN port. 
  To connect the E1/T1 WAN port to E1/T1 lines: 
1.  Connect the RJ-45 connector on one end of the cable to the E1/T1 WAN port, labeled 
T1E1. 
Figure  6-9: Connecting the E1/T1 WAN Port 
 
2.  Connect the other end of the cable to the E1 or T1 line.