AudioCodes Mediant 500 - Connecting to an ISDN PRI (E1;T1) Trunk; Figure 5-3: RJ-48 C Connector Pinouts for E1;T1; Figure 5-4: Cabling E1;T1 Port

Session Border Controllers 25 Mediant 500 E-SBC
Hardware Installation Manual 5. Cabling the Device
5.3 Connecting to an ISDN PRI (E1/T1) Trunk
The procedure below describes the cabling of the device's E1/T1 (PRI) trunk interface.
Warning: To protect against electrical shock and fire, use a 26 AWG min wire to
connect the E1 / T1 port to the PSTN.
Note: PRI interface is a customer-ordered item.
The RJ-48c trunk connector used in the cabling is wired according to the figure below:
Figure 5-3: 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.
Figure 5-4: Cabling E1/T1 Port