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The ShoreTel ST1D Voice Switch supports two ISDN primary rate interfaces (T1/E1) which can be re-assigned to support up to 60 SIP trunks.
ShoreTel ST2D Voice Switch Features
- Supports 2 T1/E1 lines
- Integrated CSU
- 60 SIP Trunks
- 2 10/100/1000 Ethernet (RJ-45) ports
- 2 T1/E1 ports (RJ48C)
- 19" rack mountable