Installation guide
492 Planning and Installation Guide ShoreTel 14.2
ShoreTel Voice Switches IPBX-T1 and IPBX-E1 Voice Switch
F
When off, the switch has no power.
Framing: This LED indicates network framing status, as follows:
When green, the T1/E1 signal is in frame; the signal is synchronized.
When yellow, a yellow alarm has been received from the CO.
When flashing yellow, the frame-bit error rate has exceeded its limits.
When flashing slow yellow, frame-bit errors (>1 per million) have occurred; this state will take
up to 10 minutes to clear.
When flashing fast yellow, frame-bit errors (>1 per 1000) have occurred.
When red, the T1/E1 signal is out-of-frame (OOF). The received signal cannot be framed to
the Extended Superframe (ESF) or D4 format.
When off, the switch has no power.
Loopback: This LED indicates loopback status for testing, as follows:
When yellow, loopback is enabled. This may be set from within ShoreTel Director or from the
CO.
When off, loopback is disabled.
IPBX-T1 and IPBX-E1 Connectors
The IPBX-T1 and IPBX-E1 voice switches contain the following components:
1 DB-9 female connector for maintenance
1 RJ-45 connector for the LAN interface
1 RJ-48C connector for T1 or E1 monitoring
1 RJ-48C connector for the T1 or E1 interface