Nortel Networks M3310 - Manual (Page 51)

Digital Telephone IP Adapter Installation and Administration Guide 51
January 2005 Digital Telephone IP Adapter description
Emergency service number
To make an emergency service call, you must use a PSTN telephone. The Digital
Telephone IP Adapter unit does not support emergency service calls.
ATTENTION!
You must place emergency service calls on a telephone that
is directly connected to a PSTN line. If you place an
emergency service call from a station that is connected to a
Digital Telephone IP Adapter unit, the RLC routes the call
through the host PBX. (The host PBX could be in a
different city.)