CHAPTER5 Cabling the Device
Mediant 800 Gateway & E-SBC | Hardware Installation Manual
Figure 5-12: Cabling (Ports 1 and 2) PSTN Fallback
● PSTN Fallback is supported only on BRI interfaces.
● PSTN Fallback is supported only between ports on the same BRI module.
● This PSTN Fallback feature has no relation to the PSTN Fallback Software
Upgrade Key.
Connecting ISDN E1/T1 Interfaces
This section describes how to cable the PRI interfaces.
Connecting to ISDN PRI (E1/T1) Trunks
The procedure below describes the cabling of the device's E1/T1 (PRI) trunk interfaces.
● PRI port cabling must be routed only indoors and must not exit the building.
● To protect against electrical shock and fire, use a 26 AWG min wire to connect T1
or E1 ports to the PSTN.
● To comply with EMC rules and regulations, use shielded twisted pair (STP) cables
for E1 interfaces.
PRI interfaces are a separate orderable item.
Cable specifications:
■ Cable: STP cable of 26 AWG min.
■ Connector Type: RJ-48c
■ Connector Pinouts:
Figure 5-13: RJ-48c Connector Pinouts for E1/T1
➢ To connect the E1/T1 trunk interface:
1. Connect the E1/T1 trunk cable to the device’s E1/T1 port.
2. Connect the other end of the trunk cable to your PBX/PSTN switch.
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