Specifications

Configuring and Managing Integrated Modems
Modems and Modem Feature Support
DC-64
Cisco IOS Dial Technologies Configuration Guide
to an ISDN B channel allowing the remote station or terminal adapter to use the fast call setup times
offered by ISDN. This feature allows V.110 calls to be originated and terminated over ISDN. It also
enables GSM wireless connectivity.
V.110, as an alternative to V.120, provides DTE with V-series type interfaces with access to ISDN
network by bit stuffing. Many V.110 devices are used in Europe and Japan. In Japan, MICA supports the
Personal-Handyphone-System Internet Access Forum Standard (PIAFS) protocol, which is similar to
V.110.
The V.110 implementation for calls on MICA modems is managed by special boardware and modem
code, along with the appropriate Cisco IOS image, in a manner similar to other modulation standards.
This MICA V.110 implementation provides V.110 user rates ranging from 600 bps to 38,400 bps.
V.110 is supported on the following Cisco devices and network modules:
• Cisco AS5300-series access servers
• Cisco 3620, 3640, and 3660 access routers
• NM-6DM, NM-12DM, NM-18DM, NM-24DM, and NM-30DM network modules
The digital signal processors (DSPs) on the board can function as either modems or V.110 terminal
adapters (or V.120 terminal adapters for NextPort DSPs). Based on the ISDN Q.931 bearer capability
information element, the Cisco IOS software configures the DSP to treat the incoming call as a modem
call, a V.110 call, or a V.120 call.
Figure 18 shows a dial-in scenario for how V.110 technology can be used with a stack of
Cisco AS5300-series access servers.
Figure 18 V.110 Dial-In Scenario Using a Stack of Cisco AS5300-Series Access Servers
S6819
GSM cellular
satellite
Cellular
phone
Laptop with
wireless modem
Cellular
tower
V.110 terminal
adapter
Telecommuter or
home office
Dial process
server
Stack of Cisco AS5300
access servers loaded with
V.110 terminal adapter cards
PRIPRI
PSTN/
ISDN
network
Internet or
enterprise