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The ShoreTel ST1D Voice Switch supports one ISDN primary rate interface (T1/E1) which can be re-assigned to support up to 30 SIP trunks.
ShoreTel ST1D Voice Switch Features
- Supports 1 T1/E1 line
- Integrated CSU
- 30 SIP Trunks
- 2 10/100/1000 Ethernet (RJ-45) ports
- 1 T1/E1 port (RJ48C)
- 19" rack mountable