Support Of At&T's 4Ess Switch Protocol - 3Com 3C10402B Administrator's Manual

176 C 8: PSTN G
HAPTER
Support of AT&T's
4ESS Switch Protocol
C
ATEWAY ONFIGURATION
4ESS is the AT&T proprietary version of ISDN. You can select the 4ESS
protocol when you configure a T1 Digital Line Card for PRI (Primary Rate
Interface) operation. If you select the 4ESS protocol, you can optionally
use Call By Call Service Configuration which enables you to select one of
three access services:
SDN (Software Defined Network) — A premises-to-premises service
■
with voice and voice-grade data transport, plus a number of
customer-controllable call management and call monitoring features
(for example, Virtual Private Networking). You cannot configure SDN
as the default setting but you can configure the system dial plan to
use SDN.
MEGACOM — A high-volume outward calling service. MEGACOM
■
can be the default setting.
Long Distance — The default service if you select the 4ESS protocol,
■
but purchases no other services. You can use Long Distance with SDN
but not with MEGACOM.
Selecting the 4ESS Protocol
To enable the 4ESS protocol:
1 Click PSTN Gateway Configuration > ISDN PRI Spans.
2 Click the MAC address of the desired span.
3 From the CO Switch Protocol drop-down list, select AT&T Custom - 4ESS.
4 Click either:
a OK to enable the 4ESS protocol and exit from the window.
b Apply to enable 4ESS, to remain in the Modify window and configure
Call-By-Call Service. See
Location" on
Configuring Call-By-Call Service
You order the optional Call-By-Call Service from your long-distance carrier
only if you order the 4ESS protocol. 3Com does not support Call-By-Call
Service with any other protocol.
To configure Call-By-Call Service:
1 Click PSTN Gateway Configuration > ISDN PRI Spans.
2 Click the MAC address of the desired span.
3 Enable the Enable Call-By-Call Service check box.
"Setting Up a Digital Line Card at a Remote
page 183 for more information.